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1.18 |
<?xml version='1.0' encoding='UTF-8'?>
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<!DOCTYPE sections SYSTEM "/dtd/book.dtd">
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1.4 |
<!-- The content of this document is licensed under the CC-BY-SA license -->
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<!-- See http://creativecommons.org/licenses/by-sa/1.0 -->
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1.23 |
<!-- $Header: /home/cvsroot/gentoo/xml/htdocs/doc/en/handbook/hb-install-config.xml,v 1.22 2004/02/07 18:24:26 swift Exp $ -->
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1.8 |
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1.2 |
<sections>
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swift |
1.1 |
<section>
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<title>Filesystem Information</title>
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swift |
1.3 |
<subsection>
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<title>What is fstab?</title>
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swift |
1.1 |
<body>
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<p>
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swift |
1.3 |
Under Linux, all partitions used by the system must be listed in
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<path>/etc/fstab</path>. This file contains the mountpoints of those partitions
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(where they are seen in the file system structure), how they should be mounted
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(special options) and when (automatically or not, can users mount those or not,
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etc.).
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swift |
1.1 |
</p>
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</body>
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swift |
1.3 |
</subsection>
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<subsection>
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<title>Creating /etc/fstab</title>
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<body>
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<p>
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1.17 |
<path>/etc/fstab</path> uses a special syntax. Every line consists of six
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swift |
1.9 |
fields, separated by whitespace (space(s), tabs or a mixture). Each field has
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swift |
1.3 |
its own meaning:
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</p>
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<ul>
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<li>
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The first field shows the <b>partition</b> described (the path to the device
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file)
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</li>
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<li>
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The second field shows the <b>mountpoint</b> at which the partition should be
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mounted
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</li>
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<li>
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The third field shows the <b>filesystem</b> used by the partition
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</li>
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<li>
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The fourth field shows the <b>mountoptions</b> used by <c>mount</c> when it
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wants to mount the partition. As every filesystem has its own mountoptions,
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you are encouraged to read the mount manpage (<c>man mount</c>) for a full
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1.9 |
listing. Multiple mountoptions are comma-separated.
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swift |
1.3 |
</li>
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<li>
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The fifth field is used by <c>dump</c> to determine if the partition needs to
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be <b>dump</b>ed or not. You can generally leave this as <c>0</c> (zero).
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</li>
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<li>
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1.17 |
The sixth field is used by <c>fsck</c> to determine the order in which
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filesystems should be <b>check</b>ed if the system wasn't shut down properly.
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The root filesystem should have <c>1</c> while the rest should have <c>2</c>
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(or <c>0</c> in case a filesystem check isn't necessary).
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swift |
1.3 |
</li>
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</ul>
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<p>
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So start <c>nano</c> (or your favorite editor) to create your
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<path>/etc/fstab</path>:
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</p>
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<pre caption="Opening /etc/fstab">
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# <i>nano -w /etc/fstab</i>
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</pre>
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<p>
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swift |
1.17 |
Let us take a look at how we write down the options for the <path>/boot</path>
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swift |
1.3 |
partition. This is just an example, so if your architecture doesn't require a
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<path>/boot</path> partition, don't copy it verbatim.
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</p>
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<p>
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In our default x86 partitioning example <path>/boot</path> is the
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<path>/dev/hda1</path> partition, with <c>ext2</c> as filesystem. It shouldn't
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be mounted automatically (<c>noauto</c>) but does need to be checked. So we
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would write down:
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</p>
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<pre caption="An example /boot line for /etc/fstab">
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/dev/hda1 /boot ext2 noauto 1 2
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</pre>
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<p>
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Now, to improve performance, most users would want to add the <c>noatime</c>
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option as mountoption, which results in a faster system since access times
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aren't registered (you don't need those generally anyway):
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</p>
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<pre caption="An improved /boot line for /etc/fstab">
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/dev/hda1 /boot ext2 noauto,noatime 1 2
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</pre>
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<p>
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If we continue with this, we would end up with the following three lines (for
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<path>/boot</path>, <path>/</path> and the swap partition):
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</p>
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<pre caption="Three /etc/fstab lines">
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/dev/hda1 /boot ext2 noauto,noatime 1 2
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/dev/hda2 none swap sw 0 0
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/dev/hda3 / ext3 noatime 0 1
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</pre>
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<p>
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To finish up, you should add a rule for <path>/proc</path>, <c>tmpfs</c>
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swift |
1.7 |
(required) and for your CD-ROM drive (and of course, if you have other
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swift |
1.3 |
partitions or drives, for those too):
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</p>
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<pre caption="A full /etc/fstab example">
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/dev/hda1 /boot ext2 noauto,noatime 1 2
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/dev/hda2 none swap sw 0 0
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/dev/hda3 / ext3 noatime 0 1
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none /proc proc defaults 0 0
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none /dev/shm tmpfs defaults 0 0
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/dev/cdroms/cdrom0 /mnt/cdrom auto noauto,user 0 0
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</pre>
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<p>
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<c>auto</c> makes <c>mount</c> guess for the filesystem (recommended for
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removable media as they can be created with one of many filesystems) and
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<c>user</c> makes it possible for non-root users to mount the CD.
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</p>
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<p>
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Now use the above example to create your <path>/etc/fstab</path>. If you are a
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SPARC-user, you should add the following line to your <path>/etc/fstab</path>
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too:
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</p>
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<pre caption="Adding openprom filesystem to /etc/fstab">
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swift |
1.5 |
none /proc/openprom openpromfs defaults 0 0
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</pre>
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<p>
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If you need <c>usbfs</c>, add the following line to <path>/etc/fstab</path>:
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</p>
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<pre caption="Adding usbfs filesystem to /etc/fstab">
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none /proc/bus/usb usbfs defaults 0 0
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swift |
1.3 |
</pre>
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<p>
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Reread your <path>/etc/fstab</path>, save and quit to continue.
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</p>
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</body>
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</subsection>
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swift |
1.2 |
</section>
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<section>
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swift |
1.1 |
<title>Networking Information</title>
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swift |
1.3 |
<subsection>
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<title>Hostname, Domainname etc.</title>
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<body>
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<p>
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One of the choices the user has to make is name his PC. This seems to be quite
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easy, but <e>lots</e> of users are having difficulties finding the appropriate
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name for their Linux-pc. To speed things up, know that any name you choose can
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be changed afterwards. For all we care, you can just call your system
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<c>tux</c> and domain <c>homenetwork</c>.
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</p>
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<p>
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We use these values in the next examples. First we set the hostname:
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</p>
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<pre caption="Setting the hostname">
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# <i>echo tux > /etc/hostname</i>
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</pre>
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<p>
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Second we set the domainname:
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</p>
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<pre caption="Setting the domainname">
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# <i>echo homenetwork > /etc/dnsdomainname</i>
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</pre>
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<p>
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If you have a NIS domain (if you don't know what that is, then you don't have
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one), you need to define that one too:
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</p>
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<pre caption="Setting the NIS domainname">
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# <i>echo nis.homenetwork > /etc/nisdomainname</i>
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swift |
1.12 |
</pre>
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<p>
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Now add the <c>domainname</c> script to the default runlevel:
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</p>
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<pre caption="Adding domainname to the default runlevel">
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# <i>rc-update add domainname default</i>
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swift |
1.3 |
</pre>
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</body>
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</subsection>
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<subsection>
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<title>Configuring your Network</title>
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<body>
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<p>
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Before you get that "Hey, we've had that already"-feeling, you should remember
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that the networking you set up in the beginning of the gentoo installation was
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just for the installation. Right now you are going to configure networking for
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your Gentoo system permanently.
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</p>
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<p>
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All networking information is gathered in <path>/etc/conf.d/net</path>. It uses
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a straightforward yet not intuitive syntax if you don't know how to setup
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networking manually. But don't fear, we'll explain everything :)
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</p>
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<p>
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First open <path>/etc/conf.d/net</path> with your favorite editor (<c>nano</c>
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is used in this example):
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</p>
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<pre caption="Opening /etc/conf.d/net for editing">
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# <i>nano -w /etc/conf.d/net</i>
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</pre>
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<p>
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The first variable you'll find is <c>iface_eth0</c>. It uses the following
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syntax:
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</p>
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<pre caption="iface_eth0 syntaxis">
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iface_eth0="<i><your ip address></i> broadcast <i><your broadcast address></i> netmask <i><your netmask></i>"
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</pre>
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<p>
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If you use DHCP (automatic IP retrieval), you should just set <c>iface_eth0</c>
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swift |
1.21 |
to <c>dhcp</c>. If you use rp-pppoe (e.g. for ADSL), set it to <c>up</c>.
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If you need to setup your network manually and you're
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swift |
1.3 |
not familiar with all the above terms, please read the section on <uri
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link="?part=1&chap=3#doc_chap4_sect3">Understanding Network
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Terminology</uri> if you haven't done so already.
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</p>
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<p>
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swift |
1.23 |
So let us give three examples; the first one uses DHCP, the second one a static
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IP (192.168.0.2) with netmask 255.255.255.0, broadcast 192.168.0.255 and
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gateway 192.168.0.1 while the third one just activates the interface for
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rp-pppoe usage:
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swift |
1.3 |
</p>
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<pre caption="Examples for /etc/conf.d/net">
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<comment>(For DHCP:)</comment>
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iface_eth0="dhcp"
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<comment>(For static IP:)</comment>
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iface_eth0="192.168.0.2 broadcast 192.168.0.255 netmask 255.255.255.0"
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gateway="eth0/192.168.0.1"
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swift |
1.23 |
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<comment>(For rp-pppoe:)</comment>
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iface_eth0="up"
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swift |
1.3 |
</pre>
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<p>
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If you have several network interfaces, create extra <c>iface_eth</c> variables,
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like <c>iface_eth1</c>, <c>iface_eth2</c> etc. The <c>gateway</c> variable
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shouldn't be reproduced as you can only set one gateway per computer.
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</p>
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<p>
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Now save the configuration and exit to continue.
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</p>
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</body>
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</subsection>
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<subsection>
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| 286 |
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<title>Automatically Start Networking at Boot</title>
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swift |
1.1 |
<body>
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<p>
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swift |
1.3 |
To have your network interfaces activated at boot, you need to add those to the
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default runlevel. If you have PCMCIA interfaces you should skip this action as
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the PCMCIA interfaces are started by the PCMCIA init script.
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</p>
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<pre caption="Adding net.eth0 to the default runlevel">
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# <i>rc-update add net.eth0 default</i>
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</pre>
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| 298 |
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<p>
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If you have several network interfaces, you need to create the appropriate
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<path>net.eth1</path>, <path>net.eth2</path> etc. initscripts for those. You can
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use <c>ln</c> to do this:
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swift |
1.1 |
</p>
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swift |
1.3 |
<pre caption="Creating extra initscripts">
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# <i>cd /etc/init.d</i>
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# <i>ln -s net.eth0 net.eth1</i>
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# <i>rc-update add net.eth1 default</i>
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</pre>
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| 311 |
swift |
1.1 |
</body>
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| 312 |
swift |
1.3 |
</subsection>
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| 313 |
|
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<subsection>
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| 314 |
|
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<title>Writing Down Network Information</title>
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| 315 |
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<body>
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<p>
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|
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You now need to inform Linux about your network. This is defined in
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<path>/etc/hosts</path> and helps in resolving hostnames to IP addresses
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|
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for hosts that aren't resolved by your nameserver. For instance, if your
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internal network consists of three PCs called <c>jenny</c> (192.168.0.5),
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swift |
1.14 |
<c>benny</c> (192.168.0.6) and <c>tux</c> (192.168.0.7 - this system) you would
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swift |
1.3 |
open <path>/etc/hosts</path> and fill in the values:
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|
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</p>
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| 325 |
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|
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<pre caption="Opening /etc/hosts">
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|
|
# <i>nano -w /etc/hosts</i>
|
| 328 |
|
|
</pre>
|
| 329 |
|
|
|
| 330 |
|
|
<pre caption="Filling in the networking information">
|
| 331 |
swift |
1.14 |
127.0.0.1 localhost
|
| 332 |
swift |
1.22 |
192.168.0.5 jenny.homenetwork jenny
|
| 333 |
|
|
192.168.0.6 benny.homenetwork benny
|
| 334 |
|
|
192.168.0.7 tux.homenetwork tux
|
| 335 |
swift |
1.3 |
</pre>
|
| 336 |
|
|
|
| 337 |
|
|
<p>
|
| 338 |
|
|
If your system is the only system (or the nameservers handle all name
|
| 339 |
|
|
resolution) a single line is sufficient:
|
| 340 |
|
|
</p>
|
| 341 |
|
|
|
| 342 |
|
|
<pre caption="/etc/hosts for lonely or fully integrated PCs">
|
| 343 |
|
|
127.0.0.1 localhost tux
|
| 344 |
|
|
</pre>
|
| 345 |
|
|
|
| 346 |
|
|
<p>
|
| 347 |
|
|
Save and exit the editor to continue.
|
| 348 |
|
|
</p>
|
| 349 |
|
|
|
| 350 |
|
|
<p>
|
| 351 |
|
|
If you don't have PCMCIA, you can now continue with <uri
|
| 352 |
swift |
1.20 |
link="#doc_chap3">System Information</uri>. PCMCIA-users should read the
|
| 353 |
swift |
1.3 |
following topic on PCMCIA.
|
| 354 |
|
|
</p>
|
| 355 |
|
|
|
| 356 |
|
|
</body>
|
| 357 |
|
|
</subsection>
|
| 358 |
|
|
<subsection>
|
| 359 |
|
|
<title>Optional: Get PCMCIA Working</title>
|
| 360 |
|
|
<body>
|
| 361 |
|
|
|
| 362 |
|
|
<p>
|
| 363 |
|
|
PCMCIA-users should first install the <c>pcmcia-cs</c> package:
|
| 364 |
|
|
</p>
|
| 365 |
|
|
|
| 366 |
|
|
<pre caption="Installing pcmcia-cs">
|
| 367 |
swift |
1.10 |
# <i>emerge --usepkg pcmcia-cs</i>
|
| 368 |
swift |
1.3 |
</pre>
|
| 369 |
|
|
|
| 370 |
|
|
<p>
|
| 371 |
swift |
1.19 |
When <c>pcmcia-cs</c> is installed, add <c>pcmcia</c> to the <e>default</e>
|
| 372 |
swift |
1.3 |
runlevel:
|
| 373 |
|
|
</p>
|
| 374 |
|
|
|
| 375 |
swift |
1.19 |
<pre caption="Adding pcmcia to the default runlevel">
|
| 376 |
|
|
# <i>rc-update add pcmcia default</i>
|
| 377 |
swift |
1.3 |
</pre>
|
| 378 |
|
|
|
| 379 |
|
|
</body>
|
| 380 |
|
|
</subsection>
|
| 381 |
swift |
1.2 |
</section>
|
| 382 |
|
|
<section>
|
| 383 |
swift |
1.1 |
<title>System Information</title>
|
| 384 |
|
|
<body>
|
| 385 |
|
|
|
| 386 |
|
|
<p>
|
| 387 |
swift |
1.3 |
Gentoo uses <path>/etc/rc.conf</path> for general, system-wide configuration.
|
| 388 |
|
|
Open up <path>/etc/rc.conf</path> and enjoy all the comments in that file :)
|
| 389 |
|
|
</p>
|
| 390 |
|
|
|
| 391 |
|
|
<pre caption="Opening /etc/rc.conf">
|
| 392 |
|
|
# <i>nano -w /etc/rc.conf</i>
|
| 393 |
|
|
</pre>
|
| 394 |
|
|
|
| 395 |
|
|
<p>
|
| 396 |
|
|
As you can see, this file is well commented to help you set up the necessary
|
| 397 |
swift |
1.16 |
configuration variables. Take special care with the <c>KEYMAP</c> setting: if
|
| 398 |
|
|
you select the wrong <c>KEYMAP</c> you will get weird results when typing on
|
| 399 |
|
|
your keyboard.
|
| 400 |
|
|
</p>
|
| 401 |
|
|
|
| 402 |
|
|
<note>
|
| 403 |
|
|
Users of USB-based SPARC systems and SPARC clones might need to select an i386
|
| 404 |
|
|
keymap (such as "us") instead of "sunkeymap".
|
| 405 |
|
|
</note>
|
| 406 |
|
|
|
| 407 |
|
|
<p>
|
| 408 |
|
|
When you're finished configuring <path>/etc/rc.conf</path>, save and exit, then
|
| 409 |
|
|
continue with <uri link="?part=1&chap=9">Configuring the Bootloader</uri>.
|
| 410 |
swift |
1.1 |
</p>
|
| 411 |
|
|
|
| 412 |
|
|
</body>
|
| 413 |
|
|
</section>
|
| 414 |
swift |
1.2 |
</sections>
|