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| w.i.p
| | [[Category:HOWTO]] |
| ==Introduction==
| | [[Category:Metro]] |
| A hostname is a unique name created to identify a machine on a network. In computer networking, a hostname is a label that is assigned to a device connected to a computer network and that is used to identify the device in various forms of electronic communication such as the World Wide Web, e-mail or Usenet. Hostnames may be simple names consisting of a single word or phrase, or they may be structured.
| | __TOC__ |
| ==Configuration==
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| In Funtoo Linux <code>/etc/conf.d/hostname</code> is the only configuration file for setting a hostname. In OpenRC framework <code>/etc/conf.d/foo</code> is the configuration file for a corresponding Init script <code>/etc/init.d/foo</code>. With the case of hostname, default value in <code>/etc/conf.d/hostname</code> is set to ''localhost'', means when system boots and OpenRC's <code>/etc/init.d/hostname</code> script started a hostname getting only ''localhost'' name. How it looks? In your shell promt this will look in following way, an example for root:
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| <console>
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| localhost ~ # ##i## Hello :)
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| </console>
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| Let's play a bit with a configuration. Open <code>/etc/conf.d/hostname</code> with your favorite editor and set a hostname of your choice. Below, I will use a real examples from one of my working test boxes.
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| <console>
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| localhost ~ # ##i## nano /etc/conf.d/hostname
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| </console>
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| Let's set it to hostname="oleg-stable.host.funtoo.org". Save the file and restart a hostname service:
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| <console>
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| localhost ~ # ##i## service hostname restart
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| </console>
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| Now, let's examine our changes, after a restarting a hostname
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| <console>
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| oleg-stable ~ # ##i## Hello :)
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| </console>
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| == Diving deeper==
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| Notice, that in above output we seeing a shortened hostname and not a FQDN (Fully Qualified Domain Name). Don't be frustrated. This is how default bash promt <code>PS1</code> set. To get nice promts, please, consult http://www.ibm.com/developerworks/library/l-tip-prompt/ <-- this one should be on Funtoo wiki :)
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| Another way to test our settings is using a '''hostname''' command. Here we will show only some of it's features. Let's try to execute '''hostname''' command:
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| <console>
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| oleg-stable ~ # ##i## hostname
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| oleg-stable.host.funtoo.org
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| </console>
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| Now we see our fully qualified domain name hostname just how we configured it in <code>/etc/conf.d/hostname</code> in above paragraph. To get a short hostname we need to set '''-s ''' (short) argument to hostname command.
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| <console>
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| oleg-stable ~ # ##i## hostname -s
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| oleg-stable
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| </console>
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| Good! Hostname offers more then just displaying a system host name but can also set one. Let's try:
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| <console>
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| oleg-stable ~ # ##i## hostname foo.bar.baz
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| oleg-stable ~ # ##i## hostname
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| foo.bar.baz
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| </console>
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| As you can see, we changed a hostname on-the-fly. This is not recommended way.
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| {{fancywarning|Please, notice that using '''hostname''' command to configure will work temporary for a current session and will be reverted back to a value set in <code>/etc/conf.d/hostname</code> file with next system restart.}}
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| Now that we got a brief description of a hostname and basic configuration steps, its time to reflect another important case which is directly related to a Funtoo Linux hostname generation, a hosts.
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| ==Hosts case==
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| As per man page <code>hosts</code> stands for static table lookup for hostnames and it's configuration file is <code>/etc/hosts</code>. Here is how it looks
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| {{file|name=/etc/hosts|body=
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| # Auto-generated hostname. Please do not remove this comment.
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| 127.0.0.1 oleg-stable.host.funtoo.org oleg-stable localhost localhost.localdomain
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| ::1 oleg-stable.host.funtoo.org oleg-stable localhost localhost.localdomain
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| }}
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