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1 <?xml version='1.0' encoding='UTF-8'?>
2 <!DOCTYPE sections SYSTEM "/dtd/book.dtd">
3
4 <!-- The content of this document is licensed under the CC-BY-SA license -->
5 <!-- See http://creativecommons.org/licenses/by-sa/1.0 -->
6
7 <!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/handbook/hb-install-system.xml,v 1.60 2004/11/22 23:50:27 bennyc Exp $ -->
8
9 <sections>
10
11 <version>1.58</version>
12 <date>2004-11-25</date>
13
14 <section>
15 <title>Chrooting</title>
16 <subsection>
17 <title>Optional: Selecting Mirrors</title>
18 <body>
19
20 <p>
21 If you have booted from a Gentoo LiveCD, you are able to use <c>mirrorselect</c>
22 to update <path>/etc/make.conf</path> so fast mirrors are used for both Portage
23 and source code (of course this requires a working network connection):
24 </p>
25
26 <pre caption="Selecting fast mirrors">
27 # <i>mirrorselect -a -s4 -o |grep 'GENTOO_MIRRORS=' &gt;&gt; /mnt/gentoo/etc/make.conf</i>
28 </pre>
29
30 <p>
31 If for some reason <c>mirrorselect</c> fails, don't panic. This step is
32 completely optional, the default values suffice.
33 </p>
34
35 </body>
36 </subsection>
37 <subsection>
38 <title>Copy DNS Info</title>
39 <body>
40
41 <p>
42 One thing still remains to be done before we enter the new environment and that
43 is copying over the DNS information in <path>/etc/resolv.conf</path>. You need
44 to do this to ensure that networking still works even after entering the new
45 environment. <path>/etc/resolv.conf</path> contains the nameservers for your
46 network.
47 </p>
48
49 <pre caption="Copy over DNS information">
50 <comment>(The "-L" option is needed to make sure we don't copy a symbolic link)</comment>
51 # <i>cp -L /etc/resolv.conf /mnt/gentoo/etc/resolv.conf</i>
52 </pre>
53
54 </body>
55 </subsection>
56 <subsection>
57 <title>Mounting the proc Filesystem</title>
58 <body>
59
60 <p>
61 Mount the <path>/proc</path> filesystem on <path>/mnt/gentoo/proc</path> to
62 allow the installation to use the kernel-provided information even within the
63 chrooted environment.
64 </p>
65
66 <pre caption="Mounting /proc">
67 # <i>mount -t proc none /mnt/gentoo/proc</i>
68 </pre>
69
70 </body>
71 </subsection>
72 <subsection>
73 <title>Entering the new Environment</title>
74 <body>
75
76 <p>
77 Now that all partitions are initialized and the base environment
78 installed, it is time to enter our new installation environment by
79 <e>chrooting</e> into it. This means that we change from the current
80 installation environment (LiveCD or other installation medium) to your
81 installation system (namely the initialized partitions).
82 </p>
83
84 <p>
85 This chrooting is done in three steps. First we will change the root
86 from <path>/</path> (on the installation medium) to <path>/mnt/gentoo</path>
87 (on your partitions) using <c>chroot</c>. Then we will create a new environment
88 using <c>env-update</c>, which essentially creates environment variables.
89 Finally, we load those variables into memory using <c>source</c>.
90 </p>
91
92 <pre caption = "Chrooting into the new environment">
93 # <i>chroot /mnt/gentoo /bin/bash</i>
94 # <i>env-update</i>
95 * Caching service dependencies...
96 # <i>source /etc/profile</i>
97 </pre>
98
99 <p>
100 Congratulations! You are now inside your own Gentoo Linux environment.
101 Of course it is far from finished, which is why the installation still
102 has some sections left :-)
103 </p>
104
105 </body>
106 </subsection>
107 <subsection>
108 <title>Optional: Updating the Portage tree</title>
109 <body>
110
111 <p>
112 If you haven't installed a Portage snapshot in the previous chapter, you must
113 download a recent Portage tree from the Internet. <c>emerge --sync</c> does this
114 for you. Other users should skip this and continue with <uri
115 link="#configure_USE">Configuring the USE variable</uri>.
116 </p>
117
118 <pre caption="Updating the Portage tree">
119 # <i>emerge --sync</i>
120 </pre>
121
122 <p>
123 Portage uses the RSYNC protocol for updating the Portage tree. If the above
124 command fails due to your firewall, use <c>emerge-webrsync</c> which
125 downloads and installs a Portage snapshot for you using the regular HTTP
126 protocol.
127 </p>
128
129 <pre caption="Updating the Portage tree with emerge-webrsync">
130 # <i>emerge-webrsync</i>
131 </pre>
132
133 <p>
134 If you are warned that a new Portage version is available and that you should
135 update Portage, you should ignore it. Portage will be updated for you later
136 on during the installation.
137 </p>
138
139 </body>
140 </subsection>
141 <subsection id="configure_USE">
142 <title>Configuring the USE variable</title>
143 <body>
144
145 <warn>
146 Do not make any modifications to the USE variable if you are performing a stage3
147 with GRP installation. You can alter the USE variable after having installed the
148 packages you want. Gremlins are known to attack your system if you ignore this
149 warning!
150 </warn>
151
152 <p>
153 <c>USE</c> is one of the most powerful variables Gentoo provides to its users.
154 Several programs can be compiled with or without optional support for certain
155 items. For instance, some programs can be compiled with gtk-support, or with
156 qt-support. Others can be compiled with or without SSL support. Some programs
157 can even be compiled with framebuffer support (svgalib) instead of X11 support
158 (X-server).
159 </p>
160
161 <p>
162 Most distributions compile their packages with support for as much as possible,
163 increasing the size of the programs and startup time, not to mention an enormous
164 amount of dependencies. With Gentoo you can define what options a package
165 should be compiled with. This is where <c>USE</c> comes into play.
166 </p>
167
168 <p>
169 In the <c>USE</c> variable you define keywords which are mapped onto
170 compile-options. For instance, <e>ssl</e> will compile ssl-support in the
171 programs that support it. <e>-X</e> will remove X-server support (note the minus
172 sign in front). <e>gnome gtk -kde -qt</e> will compile your programs with gnome
173 (and gtk) support, and not with kde (and qt) support, making your system fully
174 tweaked for GNOME.
175 </p>
176
177 <p>
178 The default <c>USE</c> settings are placed in
179 <path>/etc/make.profile/make.defaults</path>. What you place in
180 <path>/etc/make.conf</path> is calculated against these defaults settings. If
181 you add something to the <c>USE</c> setting, it is added to the default list. If
182 you remove something from the <c>USE</c> setting (by placing a minus sign in
183 front of it) it is removed from the default list (if it was in the default list
184 at all). <e>Never</e> alter anything inside the <path>/etc/make.profile</path>
185 directory; it gets overwritten when you update Portage!
186 </p>
187
188 <p>
189 A full description on <c>USE</c> can be found in the second part of the Gentoo
190 Handbook, <uri link="?part=2&amp;chap=2">USE flags</uri>. A full description on
191 the available USE flags can be found on your system in
192 <path>/usr/portage/profiles/use.desc</path>.
193 </p>
194
195 <pre caption="Viewing available USE flags">
196 # <i>less /usr/portage/profiles/use.desc</i>
197 <comment>(You can scroll using your arrow keys, exit by pressing 'q')</comment>
198 </pre>
199
200 <p>
201 As an example we show a <c>USE</c> setting for a KDE-based system with DVD, ALSA
202 and CD Recording support:
203 </p>
204
205 <pre caption="Opening /etc/make.conf">
206 # <i>nano -w /etc/make.conf</i>
207 </pre>
208
209 <pre caption="USE setting">
210 USE="-gtk -gnome qt kde dvd alsa cdr"
211 </pre>
212
213 <p>
214 You will probably only use one or maybe two locales on your system. Up until now
215 after compiling <c>glibc</c> a full set of all available locales will be
216 created. As of now you can activate the <c>userlocales</c> USE flag and specify
217 only the locales you will need in <path>/etc/locales.build</path>.
218 </p>
219
220 <pre caption="Activate the userlocales USE flag especially for glibc">
221 # <i>mkdir /etc/portage</i>
222 # <i>echo "sys-libs/glibc userlocales" >> /etc/portage/package.use</i>
223 </pre>
224
225 <p>
226 Now specify the locales you want to be able to use:
227 </p>
228
229 <pre caption="Opening /etc/locales.build">
230 # <i>nano -w /etc/locales.build</i>
231 </pre>
232
233 <pre caption="Specify your locales">
234 en_US/ISO-8859-1
235 en_US.UTF-8/UTF-8
236 de_DE/ISO-8859-1
237 de_DE@euro/ISO-8859-15
238 </pre>
239
240 </body>
241 </subsection>
242 <subsection>
243 <title>Optional: Using Distributed Compiling</title>
244 <body>
245
246 <p>
247 If you are interested in using a collection of systems to help in compiling your
248 system you might want to take a look at our <uri
249 link="/doc/en/distcc.xml">DistCC Guide</uri>. By using <c>distcc</c> you can use
250 the processing power of several systems to aid you with the installation.
251 </p>
252
253 </body>
254 </subsection>
255 </section>
256 <section>
257 <title>Differences between Stage1, Stage2 and Stage3</title>
258 <body>
259
260 <p>
261 Now take a seat and think of your previous steps. We asked you to
262 select a <e>stage1</e>, <e>stage2</e> or <e>stage3</e> and warned you
263 that your choice is important for further installation steps. Well, this
264 is the first place where your choice defines the subsequent steps.
265 </p>
266
267 <ul>
268 <li>
269 If you chose <e>stage1</e>, then you have to follow <e>both</e> steps in
270 this chapter (starting with <uri link="#doc_chap3">Progressing from Stage1
271 to Stage2</uri>)
272 </li>
273 <li>
274 If you chose <e>stage2</e> you only can skip the first step
275 and immediately start with the second one (<uri link="#doc_chap4">Progressing
276 from Stage2 to Stage3</uri>)
277 </li>
278 <li>
279 If you chose <e>stage3</e> (either with or without GRP) then you can skip both
280 steps and continue with <uri link="?part=1&amp;chap=7">Configuring the
281 Kernel</uri>
282 </li>
283 </ul>
284
285 </body>
286 </section>
287 <section>
288 <title>Progressing from Stage1 to Stage2</title>
289 <subsection>
290 <title>Introduction to Bootstrapping</title>
291 <body>
292
293 <p>
294 So, you want to compile everything from scratch? Okay then :-)
295 </p>
296
297 <p>
298 In this step, we will <e>bootstrap</e> your Gentoo system. This takes a
299 long time, but the result is a system that has been optimized from the
300 ground up for your specific machine and needs.
301 </p>
302
303 <p>
304 <e>Bootstrapping</e> means building the GNU C Library, GNU Compiler
305 Collection and several other key system programs.
306 </p>
307
308 <p>
309 Before starting the bootstrap, we list a couple of options you might or
310 might not want. If you do not want to read those, continue with <uri
311 link="#bootstrap">Bootstrapping the System</uri>.
312 </p>
313
314 </body>
315 </subsection>
316 <subsection>
317 <title>Optional: Downloading the Sources First</title>
318 <body>
319
320 <p>
321 If you haven't copied over all source code before, then the bootstrap
322 script will download all necessary files. It goes without saying that
323 this only works if you have a working network connnection :-) If you want to
324 download the source code first and later bootstrap the system (for instance
325 because you don't want to have your internet connection open during the
326 compilation) use the <e>-f</e> option of the bootstrap script, which will
327 fetch (hence the letter <e>f</e>) all source code for you.
328 </p>
329
330 <pre caption = "Downloading the necessary sources">
331 # <i>cd /usr/portage</i>
332 # <i>scripts/bootstrap.sh -f</i>
333 </pre>
334
335 </body>
336 </subsection>
337 <subsection id="bootstrap">
338 <title>Bootstrapping the System</title>
339 <body>
340
341 <p>
342 Okay then, take your keyboard and punch in the next commands to start
343 the bootstrap. Then go amuse yourself with something else because this step
344 takes quite some time to finish.
345 </p>
346
347 <pre caption = "Bootstrapping the system">
348 # <i>cd /usr/portage</i>
349 # <i>scripts/bootstrap.sh</i>
350 </pre>
351
352 <p>
353 Now continue with the next step, <uri link="#doc_chap4">Progressing from Stage2
354 to Stage3</uri>.
355 </p>
356
357 </body>
358 </subsection>
359 </section>
360 <section>
361 <title>Progressing from Stage2 to Stage3</title>
362 <subsection>
363 <title>Introduction</title>
364 <body>
365
366 <p>
367 If you are reading this section, then you have a bootstrapped system
368 (either because you bootstrapped it previously, or you are using a
369 <e>stage2</e>). Then it is now time to build all system packages.
370 </p>
371
372 <p>
373 <e>All</e> system packages? No, not really. In this step, you will build
374 the system packages of which there are no alternatives to use.
375 Some system packages have several alternatives (such as system loggers)
376 and as Gentoo is all about choices, we don't want to force one upon you.
377 </p>
378
379 </body>
380 </subsection>
381 <subsection>
382 <title>Optional: Viewing what will be done</title>
383 <body>
384
385 <p>
386 If you want to know what packages will be installed, execute <c>emerge
387 --pretend system</c>. This will list all packages that will be built. As this
388 list is pretty big, you should also use a pager like <c>less</c> or
389 <c>more</c> to go up and down the list.
390 </p>
391
392 <pre caption = "View what 'emerge system' will do">
393 # <i>emerge --pretend system | less</i>
394 </pre>
395
396 </body>
397 </subsection>
398 <subsection>
399 <title>Optional: Downloading the Sources</title>
400 <body>
401
402 <p>
403 If you want <c>emerge</c> to download the sources before you continue
404 (for instance because you don't want the internet connection to be left
405 open while you are building all packages) you can use the <e>--fetchonly</e>
406 option of <c>emerge</c> which will fetch all sources for you.
407 </p>
408
409 <pre caption = "Fetching the sources">
410 # <i>emerge --fetchonly system</i>
411 </pre>
412
413 </body>
414 </subsection>
415 <subsection>
416 <title>Building the System</title>
417 <body>
418
419 <p>
420 To start building the system, execute <c>emerge system</c>. Then go do
421 something to keep your mind busy, because this step takes a long time to
422 complete.
423 </p>
424
425 <pre caption = "Building the System">
426 # <i>emerge system</i>
427 </pre>
428
429 <p>
430 You can for now safely ignore any warnings about updated configuration files
431 (and running <c>etc-update</c>). When your Gentoo system is fully installed and
432 booted, do read our documentation on <uri
433 link="?part=3&amp;chap=2#doc_chap3">Configuration File Protection</uri>.
434 </p>
435
436 <p>
437 When the build process has completed, continue with <uri
438 link="?part=1&amp;chap=7">Configuring the Kernel</uri>.
439 </p>
440
441 </body>
442 </subsection>
443 </section>
444
445 </sections>

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