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1 zhen 1.3 <?xml version='1.0' encoding="UTF-8"?>
2 drobbins 1.1 <!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
3    
4 zhen 1.2 <guide link="/doc/en/faq.xml">
5 drobbins 1.1 <title>Gentoo Linux Frequently Asked Questions</title>
6     <author title="Chief Architect"><mail link="drobbins@gentoo.org">Daniel Robbins</mail></author>
7     <author title="Reviewer">Colin Morey</author>
8     <author title="Editor"><mail link="zhen@gentoo.org">John P. Davis</mail></author>
9     <author title="Editor"><mail link="stocke2@gentoo.org">Eric Stockbridge</mail></author>
10 zhware 1.16 <author title="Editor"><mail link="zhware@gentoo.org">Stoyan Zhekov</mail></author>
11 carl 1.20 <author title="Editor"><mail link="carl@gentoo.org">Carl Anderson</mail></author>
12 peesh 1.26 <author title="Editor"><mail link="peesh@gentoo.org">Jorge Paulo</mail></author>
13 swift 1.29 <author title="Editor"><mail link="swift@gentoo.org">Sven Vermeulen</mail></author>
14 drobbins 1.1 <abstract>This FAQ is a collection of questions and answers collected from the gentoo-dev mailing list and from IRC -- if you have any questions (or answers!) to add, please contact either an author or a member of the documentation team.</abstract>
15    
16 zhen 1.23 <version>1.1.4</version>
17 swift 1.36 <date>29 June 2003</date>
18    
19     <chapter>
20     <title>Featured Questions</title>
21     <section>
22     <title>Getting Started</title>
23     <body>
24     <ul>
25     <li><uri link="#doc_chap2_sect1">How is Gentoo pronounced, and what does it mean? </uri></li>
26     <li><uri link="#doc_chap2_sect2">What makes Gentoo different?</uri></li>
27     </ul>
28     </body>
29     </section>
30     <section>
31     <title>Installation</title>
32     <body>
33     <ul>
34     <li><uri link="#doc_chap3_sect1">What is the difference between the .iso and .tbz2 files?</uri></li>
35     <li><uri link="#doc_chap3_sect2">Why do the build .iso and .tbz2 files sometimes have different -r (revision) numbers?</uri></li>
36     <li><uri link="#doc_chap3_sect3">I have a Sony Super-Slim VAIO laptop, and the Gentoo Linux CD is having problems finding my PCMCIA ATAPI CD-ROM.</uri></li>
37     <li><uri link="#doc_chap3_sect4">I'm finding things to be really unstable and I'm using "-O9 -ffast-math -fomit-frame-pointer" optimizations. What gives?</uri></li>
38     <li><uri link="#doc_chap3_sect5">What's the default root password after installation?</uri></li>
39     <li><uri link="#doc_chap3_sect6">How can i change the root (or indeed any other user's) password?</uri></li>
40     <li><uri link="#doc_chap3_sect7">How do i add a normal user?</uri></li>
41     <li><uri link="#doc_chap3_sect8">Why can't a user su to root? </uri></li>
42     <li><uri link="#doc_chap3_sect9">How do I enable devfs?</uri></li>
43     <li><uri link="#doc_chap3_sect10">How to I disable devfs?</uri></li>
44     <li><uri link="#doc_chap3_sect11">How do I get a /dev/mouse that doesn't go away when I reboot (when using devfs)? </uri></li>
45     <li><uri link="#doc_chap3_sect12">Grub can't find stage x.y?</uri></li>
46     <li><uri link="#doc_chap3_sect13">My ASUS CUV4X-D won't boot and it freezes during various stages of kernel loading and hardware detection.</uri></li>
47     <li><uri link="#doc_chap3_sect14">If I have Gentoo 1.4_rc1 can I upgrade to 1.4_rc2, 1.4_final/_rc3 without reinstalling?</uri></li>
48 swift 1.37 <li><uri link="#doc_chap3_sect15">My kernel doesn't boot (properly), what should I do now?</uri></li>
49 swift 1.36 </ul>
50     </body>
51     </section>
52     <section>
53     <title>Package Management</title>
54     <body>
55     <ul>
56     <li><uri link="#doc_chap4_sect1">In what format are the packages stored?</uri></li>
57     <li><uri link="#doc_chap4_sect2">Why write a new port system (Portage) instead of using BSD's version?</uri></li>
58     <li><uri link="#doc_chap4_sect3">How does this differ from Debian's apt or BSD's ports?</uri></li>
59     <li><uri link="#doc_chap4_sect4">How do I install and uninstall packages?</uri></li>
60     <li><uri link="#doc_chap4_sect5">How can I set a global configuration for compiling packages?</uri></li>
61     <li><uri link="#doc_chap4_sect6">What happened to /etc/make.defaults?</uri></li>
62     <li><uri link="#doc_chap4_sect7">Is there a way to upgrade all installed packages e.g. apt-get upgrade or make World?</uri></li>
63     <li><uri link="#doc_chap4_sect8">When updating a package using emerge or ebuild, how do I avoid clobbering my config files?</uri></li>
64     <li><uri link="#doc_chap4_sect9">I want to perform the ./configure step myself. Can I?</uri></li>
65     <li><uri link="#doc_chap4_sect10">What if rsync doesn't work for me?</uri></li>
66     <li><uri link="#doc_chap4_sect11">How do I use emerge from behind a firewall?</uri></li>
67     <li><uri link="#doc_chap4_sect12">Can I rsync from another operating system?</uri></li>
68     <li><uri link="#doc_chap4_sect13">I have only slow modem connection at home. Can I download sources somewhere else and add them to my system?</uri></li>
69     <li><uri link="#doc_chap4_sect14">.tar.gz sources for installed software are piling up in /usr/portage/distfiles/ using valuable space. Is it safe to delete these files?</uri></li>
70     <li><uri link="#doc_chap4_sect15">I went to emerge blackdown-jdk and blackdown-jre, and afterwards java-config --list-available-vms would only list blackdown-jre. Openoffice would then refuse to emerge. What do I do? </uri></li>
71     <li><uri link="#doc_chap4_sect16">What's in /var/tmp/portage? Is it safe to delete the files and directories in /var/tmp/portage? </uri></li>
72     </ul>
73     </body>
74     </section>
75     <section>
76     <title>Usage</title>
77     <body>
78     <ul>
79     <li><uri link="#doc_chap5_sect1">I have installed openssh on my box, but can only log in as root - my normal user account doesn't work.</uri></li>
80     <li><uri link="#doc_chap5_sect2">I can start X applications as root only. </uri></li>
81     <li><uri link="#doc_chap5_sect3">How do I set up an International Keyboard Layout?</uri></li>
82     <li><uri link="#doc_chap5_sect4">DNS name resolution works for root only. </uri></li>
83     <li><uri link="#doc_chap5_sect5">Why is KDE not reading /etc/profile? </uri></li>
84     <li><uri link="#doc_chap5_sect6">Why can't my user use their own crontab? </uri></li>
85     <li><uri link="#doc_chap5_sect7">How do I get numlock to start on boot?</uri></li>
86 swift 1.37 <li><uri link="#doc_chap5_sect8">How do I have my terminal cleared when
87     I log out?</uri></li>
88 swift 1.36 </ul>
89     </body>
90     </section>
91     <section>
92     <title>Maintenance</title>
93     <body>
94     <ul>
95     <li><uri link="#doc_chap6_sect1">ReiserFS and filesystem corruption issues -- how to fix'em, etc</uri></li>
96     <li><uri link="#doc_chap6_sect2">How to I view the timestamps in /var/log/syslog.d, etc. on a pre-1.0_rc5 Gentoo system? </uri></li>
97     </ul>
98     </body>
99     </section>
100     <section>
101     <title>Development</title>
102     <body>
103     <ul>
104     <li><uri link="#doc_chap7_sect1">Where can I report bugs?</uri></li>
105     <li><uri link="#doc_chap7_sect2">How often are new releases made? </uri></li>
106     <li><uri link="#doc_chap7_sect3">I would like a package to be added to Portage; how would I go about this?</uri></li>
107     <li><uri link="#doc_chap7_sect4">How can I add a question or answer to this FAQ?</uri></li>
108     <li><uri link="#doc_chap7_sect5">make -f Makefile.cvs on a KDE app produces "invalid unused variable" errors </uri></li>
109     <li><uri link="#doc_chap7_sect6">My speaker beeps like crazy while compiling Mozilla. How do I disable console beeps? </uri></li>
110     </ul>
111     </body>
112     </section>
113     <section>
114     <title>Resources</title>
115     <body>
116     <ul>
117     <li><uri link="#doc_chap8_sect1">Where can I find more about supervise used by default in Gentoo Linux 1.0_rc5 and earlier? </uri></li>
118     <li><uri link="#doc_chap8_sect2">Where can I find more information about Gentoo Linux? </uri></li>
119     <li><uri link="#doc_chap8_sect3">Can I buy a CD of Gentoo Linux?</uri></li>
120     <li><uri link="#doc_chap8_sect4">Why, when I hit reply to a post on a Gentoo mailing list, does my answer only go to the original poster and not the entire list?</uri></li>
121     <li><uri link="#doc_chap8_sect5">This FAQ hasn't answered my question. What do I do now? </uri></li>
122     </ul>
123     </body>
124     </section>
125     </chapter>
126    
127 drobbins 1.1
128     <chapter>
129     <title>Getting Started</title>
130    
131     <section>
132     <title>How is Gentoo pronounced, and what does it mean?</title>
133 drobbins 1.11 <body><p>Gentoo is a species of small fast penguin, pronounced "gen-too" (The "g" in "gentoo" is a soft "g", as in "gentle".)</p></body>
134 drobbins 1.1 </section>
135    
136     <section>
137     <title>What makes Gentoo different?</title>
138     <body>
139     <p>Gentoo Linux is a fast, modern distribution with a clean and flexible
140     design -- in this respect, Gentoo may appeal to
141     <uri link="http://www.slackware.com/">Slackware</uri>,
142     <uri link="http://www.linuxfromscratch.org">Linux From Scratch</uri> or
143     <uri link="http://www.bsd.org">BSD</uri> users. Unlike most Linux
144     distros, Gentoo has a package system reminiscent of BSD's ports,
145     meaning the packages are continually updated to the lastest
146     versions.
147 zhen 1.5 </p>
148     </body>
149     </section>
150     </chapter>
151 drobbins 1.1
152     <chapter>
153     <title>Installation</title>
154 zhen 1.6
155 zhen 1.9 <section>
156 drobbins 1.1
157 zhen 1.10 <warn>REPORT all bugs to <uri>bugs.gentoo.org</uri>! Do not report bugs to upstream (original)
158 zhen 1.9 authors. Report the bugs to Gentoo, and we will move them upstream if necessary.
159 zhen 1.10 </warn>
160 zhen 1.9
161 drobbins 1.1 <title>What is the difference between the .iso and .tbz2 files?</title>
162     <body><p>The build <e>.tbz2</e> file is a minimal set of system files
163     that is necessary for allowing a user to bootstrap and install
164     Gentoo Linux. The build <e>.iso</e> is a complete, bootable CD image that
165     contains a system kernel, a reasonably complete set of kernel modules,
166     necessary system tools such as <c>mkfs</c> and networking support,
167     as well as the <e>.tbz2</e> minimal-system tarball. Most users will install
168     Gentoo Linux by burning the .iso file onto a CD, booting off of the CD,
169     and installing from within the minimal linux environment provided by
170     the Gentoo boot CD. It is possible, however, for users to install
171     Gentoo Linux directly from an already-existing Linux distribution.
172     Such users need only download the .tbz2 file, install the contents
173     on a spare partition (making sure to use the <c>p</c> flag when
174     untarring the tarball!), chroot, and install in the usual fashion.</p>
175     </body>
176     </section>
177    
178     <section>
179     <title>Why do the build .iso and .tbz2 files sometimes have different -r (revision) numbers?</title>
180     <body><p>
181     The .tbz2 minimal-system tarball only needs to be revised when there have
182     been significant changes to the core Gentoo Linux system (such as baselayout
183     changes, or a new profile), and as such .tbz2 updates are relatively rare.
184     The .iso file tends to get updated whenever we discover that somebody has
185     hardware that won't boot from our .iso. Since new kernel modules and
186     patches are constantly being generated, this situation probably won't
187     stabilise anytime soon.
188     </p>
189     </body>
190     </section>
191    
192     <section>
193     <title>I have a Sony Super-Slim VAIO laptop, and the Gentoo Linux CD is having problems
194     finding my PCMCIA ATAPI CD-ROM.</title>
195     <body>
196     <p>Make sure the second IDE port is set to CDROM (it unsets itself if the device isn't
197     attached on boot) then do the following at the isolinux <c>boot:</c> prompt:</p>
198     <pre>
199     boot: <i>rescue ide2=0x180,0x386</i>
200     </pre>
201     <p>If you are using a 1.0_rc5 or earlier boot CD, apart from thinking about downloading the latest iso,
202     type <c>gentoo</c> instead of <c>rescue</c>, above.</p>
203     </body>
204    
205     </section>
206     <section>
207     <title>I'm finding things to be really unstable and I'm using "-O9 -ffast-math
208     -fomit-frame-pointer" optimizations. What gives?</title>
209     <body>
210 klieber 1.35 <p>Don't bother using anything higher than <c>-O3</c> since it isn't support by current versions
211 peesh 1.34 of gcc. Very aggressive optimizations sometimes cause the compiler to streamline the assembly code
212 swift 1.30 to the point where it doesn't quite do the same thing anymore. A possible setting based on <e>Loc-Dog</e> (on IRC)'s CFLAGS
213     is <c>-O3 -mcpu=i686 -march=i686 -fforce-addr -fomit-frame-pointer -funroll-loops
214     -frerun-cse-after-loop -frerun-loop-opt -falign-functions=4</c>, which is about
215 drobbins 1.1 as much as I'd want to push global optimization settings. Beyond this, it's best to use
216     ultra-high optimizations only with specific packages where you really need that extra 2%,
217     (eg graphics and various multimedia programs), and where you can easily test the package
218     to ensure that it hasn't been optimized into oblivion.</p>
219 zhware 1.4 <p>Please try first to compile with CFLAGS <c>-march= -O2</c> before reporting a bug</p>
220 drobbins 1.1 </body>
221     </section>
222    
223     <section>
224     <title>What's the default root password after installation?</title>
225     <body><p>The default password is blank; hit enter.</p></body>
226     </section>
227    
228     <section>
229     <title>How can i change the root (or indeed any other user's) password?</title>
230     <body><p>You can use <c>passwd</c> to change the password for the user you are logged into.
231     for extra options and setting, please see <c>man passwd</c> once you've completed the install.
232     </p></body>
233     </section>
234     <section>
235     <title>How do i add a normal user?</title>
236 swift 1.36 <body>
237 drobbins 1.1 <p>The command <c>adduser gentoo</c> will add a user called gentoo. The next step is to give
238     this user a password and <c>passwd</c> will do exactly that.</p>
239 swift 1.36 <p>Instead of <c>adduser</c> you can also use:
240 zhware 1.15 <pre># <i>useradd gentoo -m -G users,audio,wheel -s /bin/bash</i></pre>
241 zhware 1.16 This will add a user gentoo, will make possible for him to use sound-related devices (<path>/dev/sound/*</path>), will make possible for him to switch to root (using <c>su</c>) and will make <path>/bin/bash</path> his login shell.
242 zhware 1.15 </p>
243 swift 1.36 <p>You can also install <c>superadduser</c> using <c>emerge superadduser</c> and then issue <c>superadduser gentoo</c> to add a user called gentoo. Just follow the instructions given to you by <c>superadduser</c>.
244     </p>
245 drobbins 1.1 </body>
246     </section>
247     <section>
248     <title>Why can't a user su to root?</title>
249     <body><p>For security reasons, users may only <c>su</c> to root if they belong to the
250     <e>wheel</e> group. To add a <i>username</i> to the <e>wheel</e> group, issue the following
251     command as root:</p>
252     <pre># <i>usermod -G users,wheel username</i></pre>
253     </body>
254     </section>
255     <section>
256     <title>How do I enable devfs?</title>
257     <body>
258     <p>
259     If you're using 1.0_rc5 or greater, you don't need to do anything special to get
260     devfs working; it's already active (you did make sure that devfs was built into the
261     kernel, didn't you?).
262     However, if you are using a version of Gentoo Linux <e>prior</e> to version 1.0_rc5, add
263     <c>devfs=mount</c> to your <c>GRUB</c> kernel boot options so that the line looks something
264     like <c>kernel /boot/boot/bzImage devfs=mount foo=bar</c> The kernel will then mount the
265     <path>/dev</path> <e>devfs</e> filesystem automatically at boot-time.
266     </p>
267     </body>
268     </section>
269     <section>
270     <title>How to I disable devfs?</title>
271     <body>
272     <p>Under Gentoo Linux 1.0_rc6 and later, you can disable devfs by passing the
273     <c>gentoo=nodevfs</c> to the kernel.</p>
274     </body>
275     </section>
276     <section>
277     <title>How do I get a <path>/dev/mouse </path> that
278     doesn't go away when I reboot (when using devfs)?</title>
279     <body>
280     <p>
281     If you are using 1.0_rc6 or later, then you can just use <c>ln -s</c>
282     to make the usual symbolic link from <path>/dev/mouse</path>, and
283     it will be preserved between reboots.
284     </p>
285     <p>All other users need to edit <path>/etc/devfsd.conf</path>
286     and add these lines:</p>
287     <pre>
288     REGISTER ^misc/psaux$ CFUNCTION GLOBAL symlink misc/psaux mouse
289     UNREGISTER ^misc/psaux$ CFUNCTION GLOBAL unlink mouse
290     </pre>
291     <p>If you are not using the devfs PS/2 mouse <path>/dev/misc/psaux</path> device,
292     adjust the <c>misc/psaux</c> strings above accoringly. You'll then want to
293     <c>killall -HUP devfsd</c>
294     to get devfsd to reread <path>/etc/devfsd.conf</path>.</p>
295     </body>
296     </section>
297     <section>
298     <title>Grub can't find stage x.y?</title>
299     <body><p>
300     During installation the grub boot files are copied
301     to <path>/boot/grub</path> (<path>/boot/boot/grub</path> in Gentoo Linux 1.0_rc5 and
302     earlier.) Grub automatically looks in the <path>/boot/grub</path> directory on the boot
303     partition. (We strongly recommend having a separate no-auto boot partition mounted at
304     <path>/boot</path>, since that way it is much more difficult to clobber your kernel and boot
305     info by accident.) The above error generally arises from (a) not using a separate boot
306     partition, (b) forgetting to mount the boot partition at <path>/boot</path> before either
307     unpacking the build snapshot or running
308     <c>emerge --usepkg system</c>, or (c) forgetting the
309     <c>notail</c> option when mounting a ReiserFS <path>/boot</path> partition.
310     You can get more information on grub, including how to
311     debug grub from the grub prompt, by reading the
312     <uri link="http://www-105.ibm.com/developerworks/education.nsf/linux-onlinecourse-bytitle/0F1731DC664023B7862569D0005C44AF?OpenDocument">IBM developerWorks Grub tutorial</uri>.
313     </p>
314     </body>
315     </section>
316    
317     <section>
318     <title>My ASUS CUV4X-D won't boot and it freezes during various stages of kernel loading and hardware
319     detection. </title>
320     <body>
321     <p>Disable MPS 1.4 (multi-processor-system) in the BIOS or switch this
322     function to 1.1. By using this option you just switch the MPS version. The Multi-Processor-System
323     will still work properly. Make sure to boot Gentoo Linux with the following boot option, noapic. </p>
324     </body>
325     </section>
326    
327 zhware 1.19 <section>
328     <title>If I have Gentoo 1.4_rc1 can I upgrade to 1.4_rc2, 1.4_final/_rc3 without reinstalling?</title>
329     <body>
330     In fact there is no difference between the 1.4 releases <b>after they&apos;ve installed</b>. Gentoo 1.4 and later are <c>glibc-2.3.x</c> based.
331 swift 1.31 As such 1.4rc1 machine for example, that does <c>emerge sync; emerge -u world</c> is <b>exactly the same</b> as a machine with 1.4rc2 installed, after it does <c>emerge sync; emerge -u world</c>. The true differences lie in the installer.
332 zhware 1.19 </body>
333     </section>
334 swift 1.37 <section>
335     <title>My kernel doesn't boot (properly), what should I do now?</title>
336     <body>
337     <p>
338     You don't need to redo every step of the installation, but only the
339     kernel-stuff and all associated steps. Suppose you have installed Gentoo
340     on <path>/dev/hda1</path> (/boot) and <path>/dev/hda3</path> (/) with
341     <path>/dev/hda2</path> being the swap space:
342     </p>
343     <pre caption = "Reconfiguring the kernel">
344     <comment>Boot from the LiveCD and wait until you receive a prompt</comment>
345     <comment>We first mount all partitions:</comment>
346     # <i>mount /dev/hda3 /mnt/gentoo</i>
347     # <i>mount /dev/hda1 /mnt/gentoo/boot</i>
348     # <i>swapon /dev/hda2</i>
349     # <i>mount -t proc none /mnt/gentoo/proc</i>
350     <comment>Then we chroot into our Gentoo environment and configure the kernel:</comment>
351     # <i>chroot /mnt/gentoo /bin/bash</i>
352     # <i>env-update &amp;&amp; source /etc/profile</i>
353     # <i>cd /usr/src/linux</i>
354     # <i>make menuconfig</i>
355     <comment>Now (de)select anything you have (de)selected wrongly at your</comment>
356     <comment>previous attempt. Then quit and compile your kernel:</comment>
357     # <i>make dep &amp;&amp; make bzImage modules modules_install</i>
358     <comment>Now copy over your bzImage file, overwriting your previous one:</comment>
359     # <i>cp arch/i386/boot/bzImage /boot</i>
360     <comment>If you use LILO, rerun lilo -- GRUB users should skip this:</comment>
361     # <i>/sbin/lilo</i>
362     <comment>Now exit the chroot and reboot.</comment>
363     # <i>exit</i>
364     # <i>umount /mnt/gentoo/proc /mnt/gentoo/boot /mnt/gentoo</i>
365     # <i>reboot</i>
366     </pre>
367     <p>
368     If on the other hand the problem lays with your bootloader configuration,
369     follow the same steps, but instead of configuring/compiling your kernel you
370     should reconfigure your bootloader (recompilation isn't necessary).
371     </p>
372     </body>
373     </section>
374 drobbins 1.1 </chapter>
375    
376     <chapter>
377     <title>Package Management</title>
378     <section>
379     <title>In what format are the packages stored?</title>
380     <body><p>They exist in our portage tree as <e>ebuild</e> autobuild scripts; we are primarily
381     a ports-based distribution, meaning that we provide scripts (<c>.ebuild</c> files) and a
382     special system (Portage) so that you can build apps from sources. We generally only build
383 swift 1.22 binaries for releases and snapshots. The <uri link="/doc/en/gentoo-howto.xml">Development HOWTO
384 drobbins 1.1 </uri> covers the contents of an ebuild script in detail. For full binary ISO releases, we
385     create a full suite of binary packages in an enhanced <c>.tbz2</c> format (<c>.tar.bz2</c>
386     compatible with meta-information attached to the end of the file.)</p>
387     </body>
388     </section>
389    
390     <section>
391     <title>Why write a new port system (Portage) instead of using BSD's version?</title>
392     <body>
393     <p>In one sentence, because Portage is much better in so many ways. One of the design
394     philosophies of the <c>.ebuild</c> syntax was to make it an analog of what you'd type to
395     install the program manually, thus making Portage very easy to learn and modify to your
396     needs. We also have OpenBSD-style "fake" installs, safe unmerging, system profiles,
397     package masking, a real dependency system, and lots of other good stuff.</p>
398     </body>
399     </section>
400    
401     <section>
402     <title>How does this differ from Debian's apt or BSD's ports?</title>
403     <body><p>Portage features the best of apt and ports; for example, USE options, a full
404     dependency system, safe installs and uninstalls, and a true package database. Think of
405     Portage as the best of both worlds; a ports system with the sensibilities and safety of a
406     Linux package management system built-in.</p></body>
407     </section>
408    
409     <section>
410     <title>How do I install and uninstall packages?</title>
411     <body>
412 swift 1.22 <p>The <uri link="/doc/en/portage-user.xml">Portage User Guide</uri> details how to install
413 drobbins 1.1 and uninstall packages, and update Portage.</p>
414     </body>
415     </section>
416    
417     <section>
418     <title>How can I set a global configuration for compiling packages?</title>
419     <body><p><path>/etc/make.conf</path> should be modified to override global and
420     profile-specific default options used to compile and merge packages. The most common options
421     are as follows:</p>
422     <table>
423     <tr>
424     <th>Flag</th>
425     <th>Description</th>
426     </tr>
427     <tr>
428     <ti>CHOST</ti>
429     <ti>This sets the HOST variable for compiles, e.g. <c>i686-pc-linux-gnu</c></ti>
430     </tr>
431     <tr>
432     <ti>CFLAGS</ti>
433     <ti>The options for <c>gcc</c> when compiling programs written in C (*.c files)</ti>
434     </tr>
435     <tr>
436     <ti>CXXFLAGS</ti>
437     <ti>The options for <c>gcc</c> when compiling programs written in C++ (*.c,*.cpp etc.
438     files)</ti>
439     </tr>
440     <tr>
441     <ti>USE</ti>
442     <ti>This allows you to set what optional components you'd like compiled-in, if
443     available. For example, if you have <c>gnome</c> inside the USE string, then when
444     you compile <c>xchat</c>, it will include GNOME support. All our dependencies are
445     also USE-aware.</ti>
446     </tr>
447     <tr>
448     <ti>GENTOO_MIRRORS</ti>
449     <ti>A space separated list of URIs currently mirroring the Gentoo packages. Portage
450     will attempt download from a <c>GENTOO_MIRROR</c> first before trying the official
451     <c>SRC_URI</c>. To force Portage to skip mirrors, set this variable to "".</ti>
452     </tr>
453     </table>
454     </body>
455     </section>
456    
457     <section>
458     <title>What happened to <path>/etc/make.defaults</path>?</title>
459     <body>
460     <p>As of Portage 1.5 onwards, <path>/etc/make.defaults</path> is antiquated;
461     if you have portage-1.5-r1 or above installed then you can safely delete it.
462     This file has been replaced by <path>/etc/make.profile/make.defaults</path>
463     (<path>/etc/make.profile</path> should actually be a symlink to,
464     <path>/usr/portage/profiles/default</path>),
465     which contains system profile-specific default settings. The priority order of
466     the various configuration files is as follows (highest first):
467     <ol>
468     <li>Environment variables</li>
469     <li><path>/etc/make.conf</path>, for your use</li>
470     <li><path>/etc/make.profile/make.defaults</path>, for profile-specific defaults</li>
471     <li><path>/etc/make.globals</path>, for global defaults (settings not specified in
472     any other place come from here)</li>
473     </ol></p></body>
474     </section>
475    
476     <section>
477     <title>Is there a way to upgrade all installed packages
478     e.g. <e>apt-get upgrade</e> or <e>make World</e>?</title>
479     <body><p><b>YES!</b> Type <c>emerge --update system</c> (use it with <c>--pretend</c> first) to
480     update all core system packages, and use <c>emerge --update world</c> (again, use it with
481     <c>--pretend</c> first) to do a complete system upgrade of all installed packages.
482    
483    
484     </p></body>
485     </section>
486    
487     <section>
488     <title>When updating a package using <c>emerge</c> or <c>ebuild</c>, how do I avoid
489     clobbering my config files?</title>
490     <body><p>
491     Portage now includes config file management support by default. Type
492     <c>emerge --help config</c> for more details. The (overly) simple answer is that if
493     a package installs <path>foo</path> somewhere under <path>/etc</path>, and
494     another <path>foo</path> already exists there, then the new <path>foo</path> will
495     instead be renamed to <path>._cfgxxxx_foo</path> in that directory. A useful
496     tool for examining and updating any protected config files is <c>etc-update</c>,
497 swift 1.27 which is now part of Portage.
498 drobbins 1.1 </p></body>
499     </section>
500    
501     <section>
502     <title>I want to perform the <c>./configure</c> step myself. Can I?</title>
503     <body><p>
504     Yes, but it is not trivial. First do <c>man ebuild</c> followed by
505     <c>ebuild foo-x.y.z.ebuild unpack</c>. Then <c>cd</c> to
506     <path>/var/tmp/portage/foo-x.y.z/work</path>. You can manually perform
507     the <c>./configure</c> and <c>make</c> steps yourself (you'll have to do
508     both, since Portage does not separate the configure and build steps). To
509     have Portage finish the installation (so that you can easily remove it later,
510     should you desire to do so, and it will be registered in Portage as a possible
511     dependency) you first need to <c>touch /var/tmp/portage/foo-x.y.z/.compiled</c>
512     (tricking Portage into thinking that <c>ebuild foo-x.y.z.ebuild compile</c> has
513     completed), followed by <c>ebuild foo-x.y.z.ebuild merge</c>.
514     </p></body>
515     </section>
516    
517     <section>
518     <title>What if rsync doesn't work for me?</title>
519     <body><p>
520     If you're behind a firewall that doesn't permit
521 swift 1.29 rsync traffic, then you can use <c>emerge-webrsync</c> which will fetch
522     and install a Portage snapshot for you through regular HTTP.
523     <c>emerge-webrsync</c> uses <c>wget</c> to download, so proxy is fully
524     supported.
525     <pre caption="Using emerge-webrsync">
526     ~# <c>emerge-webrsync</c></pre>
527     If you cannot do this either, you can manually download a snapshot
528     from <uri>http://distro.ibiblio.org/pub/linux/distributions/gentoo/snapshots/</uri>.
529     In order to install the snapshot correctly, you first need to remove
530     your current <path>/usr/portage</path> so that outdated ebuilds don't
531     stay available on your system. However, you might want to put
532     <path>/usr/portage/distfiles</path> somewhere safe if you don't want to
533     lose all your sourcecode.
534     <pre caption="Manually installing the snapshots">
535     <codenote>(First download the snapshot and place it in /usr)</codenote>
536     ~# <c>cd /usr</c>
537     ~# <c>mv /usr/portage/distfiles /usr/distfiles-temp</c>
538     ~# <c>rm -rf /usr/portage</c>
539     ~# <c>tar xvjf portage-foo.tbz2</c>
540     ~# <c>mv /usr/distfiles-temp /usr/portage/distfiles</c></pre>
541 drobbins 1.1 </p></body>
542     </section>
543    
544     <section>
545     <title>How do I use <i>emerge</i> from behind a firewall?</title>
546     <body><p>
547     Edit the PROXY settings in <path>/etc/make.conf</path>. If that doesn't work,
548     edit <path>/etc/wget/wgetrc</path> and edit http_proxy and ftp_proxy
549     appropriately.
550     </p></body>
551     </section>
552    
553     <section>
554     <title>Can I rsync from another operating system?</title>
555     <body><p>There's a program called unison that works under both UNIX and Win32, available from
556     <uri>http://www.cis.upenn.edu/~bcpierce/unison/</uri>.</p></body>
557     </section>
558    
559     <section>
560     <title>I have only slow modem connection at home. Can I download sources somewhere else and
561     add them to my system?</title>
562     <body><p>
563     Definitely. You can run <c>emerge --pretend package</c> to see what programs
564 peesh 1.24 are going to be installed. To find out the sources for those packages and where to
565     download the sources from, you can run <c>emerge -fp package</c>.
566     Download sources and bring them on any media
567 drobbins 1.1 home. Put the sources into <path>/usr/portage/distfiles</path> and run
568     <c>emerge package</c> to see it picking up the sources you just brought in!
569     </p></body>
570     </section>
571    
572     <section>
573     <title>.tar.gz sources for installed software are piling up in /usr/portage/distfiles/ using
574     valuable space. Is it safe to delete these files?</title>
575     <body><p>
576     Yes, you can safely delete these files. But if you are on a slow
577     connection, such as a modem, you might want to keep the archives if
578     possible; often several ebuilds will be released for the same version of
579     a specific piece of software - if you have deleted the archive and you
580     upgrade the software it will have to be downloaded from the internet
581     again.
582     </p></body>
583 zhen 1.5 </section>
584    
585     <section>
586     <title>I went to emerge blackdown-jdk and blackdown-jre, and afterwards
587     <c>java-config --list-available-vms</c> would only list blackdown-jre.
588     Openoffice would then refuse to emerge. What do I do? </title>
589    
590     <body>
591     <p>Solution: </p>
592     <pre caption = "Solution">
593     # <c>emerge unmerge blackdown-jre blackdown-jdk </c>
594     # <c>CONFIG_PROTECT="" emerge blackdown-jdk </c>
595     </pre>
596    
597 drobbins 1.1 </body>
598     </section>
599 zhware 1.18 <section>
600     <title>What's in <path>/var/tmp/portage</path>? Is it safe to delete the files and directories in <path>/var/tmp/portage</path>?</title>
601     <body>
602     During compilation, Gentoo saves the sources of the package in <path>/var/tmp/portage</path>. It is safe to clean out all contents of this directory.
603     </body>
604     </section>
605 drobbins 1.1 </chapter>
606    
607     <chapter>
608     <title>Usage</title>
609     <section>
610     <title>I have installed openssh on my box, but can only log in as root - my normal user
611     account doesn't work. </title>
612     <body>
613     <p>
614     This is most probably because your user account doesn't have a valid shell specified. Check
615     for your user entry in
616     <path>/etc/passwd</path> and see if it ends in /bin/bash (or any other shell). If it doesn't,
617     you must set a shell for the user. This is done using the usermod command, like this ;
618     </p>
619     <pre># <i>usermod -s /bin/bash myuser</i></pre>
620     </body>
621     </section>
622    
623     <section>
624     <title>I can start X applications as root only.</title>
625     <body><p>Your <path>/tmp</path> directory has the wrong permissions (it needs the sticky bit
626     set). Type the following as root:</p>
627     <pre># <i>chmod 1777 /tmp</i></pre>
628     </body>
629     </section>
630    
631     <section>
632     <title>How do I set up an International Keyboard Layout?</title>
633     <body><p>Edit the <c>KEYMAP</c> variable in <path>/etc/rc.conf</path>.
634     Then either reboot or restart the keymaps script:
635     <c>/etc/init.d/keymaps restart</c>.</p>
636     </body>
637     </section>
638    
639     <section>
640     <title>DNS name resolution works for root only.</title>
641     <body><p><path>/etc/resolv.conf</path> has the wrong permissions; <c>chmod</c> it as follows:
642     </p>
643     <pre># <i>chmod 0644 /etc/resolv.conf</i></pre>
644     </body>
645     </section>
646    
647     <section>
648     <title>Why is KDE not reading <path>/etc/profile</path>?</title>
649     <body><p>You need to add <c>--login</c> to the first line in <path>/opt/kde2.1/bin/startkde
650     </path>, so that it reads as follows:</p>
651     <pre>#!/bin/sh --login</pre>
652     <p>This fix has been added to recent versions of KDE.</p>
653 zhen 1.17 </body>
654     </section>
655    
656     <section>
657     <title>Why can't my user use their own crontab?</title>
658     <body><p>You need to add that user to the <i>cron</i> group.
659     </p>
660 drobbins 1.1 </body>
661     </section>
662 swift 1.32
663     <section>
664     <title>How do I get numlock to start on boot?</title>
665     <body>
666     <p>
667     If you log on graphically, or want numlock to be activated when
668 swift 1.33 you issue <c>startx</c>, then you must <c>emerge numlockx</c> and
669 swift 1.32 add <c>/usr/X11R6/bin/numlockx</c> to
670     <path>/etc/X11/xinit/xinitrc</path> (for <c>startx</c>) or
671     <path>/etc/X11/xdm/Xsetup_0</path> (for any graphical login manager).
672     </p>
673     <p>
674     If you work in commandline, you only need to <c>rc-update add
675     numlock default</c> and numlock will be activated on the next
676     reboot.
677     </p>
678     </body>
679     </section>
680 swift 1.37 <section>
681     <title>How do I have my terminal cleared when I log out?</title>
682     <body>
683     <p>
684     To have your terminal cleared, add <c>clear</c> to your
685     <path>~/.bash_logout</path> script:
686     </p>
687     <pre caption = "Clearing the terminal during logout">
688     $ <i>echo clear &gt;&gt; ~/.bash_logout</i></pre>
689     <p>
690     If you want this to happen automatically when you add a new
691     user, do the same for the <path>/etc/skel/.bash_logout</path>:
692     </p>
693     <pre caption = "Making new users their terminal clear on logout">
694     # <i>echo clear &gt;&gt; /etc/skel/.bash_logout</i></pre>
695     </body>
696     </section>
697    
698 swift 1.32
699 drobbins 1.1 </chapter>
700    
701     <chapter>
702     <title>Maintenance</title>
703     <section>
704     <title>ReiserFS and filesystem corruption issues -- how to fix'em, etc</title>
705     <body>
706     <p>
707     If your
708     ReiserFS partition is corrupt, try booting the Gentoo
709     Linux boot CD and run <c>reiserfsck --rebuild-tree</c> on
710     the corrupted filesystem. This should make the filesystem consistent
711     again, although you may have lost some files or directories due
712     to the corruption.
713     </p>
714     </body>
715     </section>
716     <!-- is this still relevant? -cpm -->
717     <section>
718     <title>How to I view the timestamps in /var/log/syslog.d, etc. on a pre-1.0_rc5 Gentoo
719     system?</title>
720     <body>
721     <p>To view multilog (Gentoo Linux 1.0_rc5 and earlier) timestamps, you need to pipe the
722     current log through the <c>tai64nlocal</c>command:</p>
723    
724     <pre>
725 seo 1.14 # <i>tai64nlocal &lt; /var/log/syslog.d/current | less</i>
726 drobbins 1.1 </pre>
727    
728     <p>Or, alternatively, if you want to "tail" the log:</p>
729    
730     <pre>
731     # <i>tail -f /var/log/syslog.d/current | tai64nlocal</i>
732     </pre>
733    
734     </body>
735     </section>
736     </chapter>
737    
738     <chapter>
739     <title>Development</title>
740     <section>
741     <title>Where can I report bugs?</title>
742     <body><p>For bugs within a specific program, contact the program's author. Otherwise, use our
743     Bugzilla bug tracker at <uri>http://bugs.gentoo.org</uri>. You can also visit us in
744 swift 1.27 <c>#gentoo</c> on the <uri link="http://www.freenode.net">FreeNode</uri> IRC network.
745 drobbins 1.1 </p></body>
746     </section>
747    
748     <section>
749     <title>How often are new releases made?</title>
750 zhen 1.13 <body><p>New releases are announced on the <uri link="http://www.gentoo.org/main/en/lists.xml">gentoo-announce</uri>
751 drobbins 1.1 mailing list<!-- TODO: approximatley every X months -->, In reality the packages themselves
752     are updated shortly after the main authors release new code. As for when new Cd images etc
753     are released, that tends to be whenever there are any major updates to the base code, or when
754     new modules get added.</p></body>
755     </section>
756    
757     <section>
758     <title>I would like a package to be added to Portage; how would I go about this?</title>
759     <body><p>Head over to <uri>http://bugs.gentoo.org</uri> and submit a new bug of the type
760     "ebuild". Attach your ebuild to the bug report.</p></body>
761     </section>
762    
763     <section>
764     <title>How can I add a question or answer to this FAQ?</title>
765     <body><p>Submit a new bug over at <uri>http://bugs.gentoo.org</uri> and add it to the
766 swift 1.28 "Docs-user" product, "Gentoo Linux FAQ" component.</p></body>
767 drobbins 1.1 </section>
768    
769     <section>
770     <title>make -f Makefile.cvs on a KDE app produces "invalid unused variable" errors</title>
771     <body><p>
772     Export <c>WANT_AUTOMAKE_1_4=1</c> for all KDE projects before running
773     <c>make -f Makefile.cvs</c>. Also, for KDE2 apps export <c>WANT_AUTOCONF_2_1=1</c>,
774     and for KDE3 apps export <c>WANT_AUTOCONF_2_5=1</c>.
775     </p></body>
776     </section>
777    
778    
779     <section>
780     <title>My speaker beeps like crazy while compiling Mozilla. How do I disable console beeps?
781     </title>
782     <body>
783     <p>
784     Console beeps can be turned off using setterm, like this ;
785    
786     <pre># <i>setterm -blength 0</i></pre>
787    
788     If you would like to turn off the console beeps on boot
789     you need to put this command in
790     <path>/etc/conf.d/local.start</path>. However, this only
791     disables beeps for the current terminal. To disable
792     beeps for other terminals, pipe the command output to the
793     target terminal, like this ;
794    
795     <pre># <i>setterm -blength 0 >/dev/vc/1</i></pre>
796    
797     You need to replace /dev/vc/1 with the terminal
798     you would like to disable console beeps for.
799     </p>
800     </body>
801     </section>
802     </chapter>
803    
804     <chapter>
805     <title>Resources</title>
806     <section>
807     <title>Where can I find more about supervise used by default in Gentoo Linux 1.0_rc5 and earlier?</title>
808     <body><p><!-- TODO: --><uri>http://cr.yp.to/daemontools.html</uri></p></body>
809     </section>
810    
811     <section>
812     <title>Where can I find more information about Gentoo Linux?</title>
813     <body><p>The official Gentoo documentation can be found on <uri>http://www.gentoo.org</uri>; general Linux information is at <uri>http://www.linuxdoc.org</uri>.</p></body>
814     </section>
815    
816     <section>
817     <title>Can I buy a CD of Gentoo Linux?</title>
818     <body><p>Yes! Fresh CDRs are available for $5 USD apiece from
819     <uri link = "http://cart.cheapbytes.com/cgi-bin/cart/0070010805">Cheapbytes</uri>.
820     </p>
821     <p>There are also CDs for sale at <uri link = "http://www.tuxcds.com/section.php?section=42">
822     tuxcds</uri> for a very good price. These people also bounce back a portion of the profits
823     to the Gentoo project, so buy them while they are hot! </p>
824     </body>
825     </section>
826    
827     <section>
828     <title>Why, when I hit reply to a post on a Gentoo mailing list, does my answer
829     only go to the original poster and not the entire list?</title>
830     <body>
831     <p>The mailing list administrators have decided to go with minimal munging
832     (altering of mail headers), which means that they have decided against
833     altering headers to have replies go to the mailing list. There are various
834     reasons for this. For example, if a subscriber has a full mailbox, the
835     entire list receives notice of this every time that something is posted.
836    
837     Most GUI based mailers have a "reply to all" function. This will ensure that
838     your reply goes to the mailing list as well as the original poster. Most
839     users of text based emailers already know the methods to use, but if you
840     don't, in Pine, there is a "reply to group" option. Setting Mutt to reply to
841     the list is covered in the unofficial documentation at
842     <uri link="http://forums.gentoo.org/viewtopic.php?t=1085">forums.gentoo.org</uri>.
843    
844     Some list members do not like this method, but it was very heavily
845     discussed when it went into effect, with arguments on both sides.
846     Eventually the list administrators decided to keep it this way. Discussing
847     it on the mailing list will sometimes bring a polite explanation and other
848     times a rather brusque comment to check the archives. Although the
849     administrators regret the inconvenience that it may cause some users, it is
850     felt that at present it is preferable to the alternative for several
851     reasons, many of these covered
852     <uri link="http://www.unicom.com/pw/reply-to-harmful.html">here</uri>.
853    
854     (There are other eloquent arguments in favor of munging, and yes, the list
855     administrators have seen them.) </p>
856     </body>
857     </section>
858    
859     <section>
860     <title>This FAQ hasn't answered my question. What do I do now?</title>
861     <body>
862 zhen 1.23 <p>A good first step is to browse through the relevant doumentation <uri link="http://www.gentoo.org/main/en/docs.xml">here</uri>,
863 drobbins 1.1 failing that, the various Gentoo Linux mailing
864 zhen 1.23 lists listed on <uri link="http://www.google.com">Google</uri>. To search through the Gentoo mailling lists,
865     just enter "lists.gentoo.org foo" to search for "foo". If all else fails, or you just want
866 drobbins 1.1 to hang out with Gentoo folks, visit us on irc: <i>#gentoo</i>
867     on <i>irc.freenode.net</i>.
868     </p>
869     </body>
870     </section>
871     </chapter>
872     </guide>

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