| 1 | <sect1 id="postlfs-config-logon">
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| 2 | <?dbhtml filename="logon.html" dir="postlfs"?>
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| 3 | <title>/etc/issue (Customizing your logon)</title>
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| 4 |
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| 5 | <para>When you first boot up your new <acronym>LFS</acronym> system, the logon
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| 6 | screen will
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| 7 | be nice and plain (as it should be in a bare-bones system). Many people
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| 8 | however, will want their system to display some information in the logon
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| 9 | message. This can be accomplished using the
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| 10 | file <filename>/etc/issue</filename>.</para>
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| 11 |
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| 12 | <para>The <filename>/etc/issue</filename> file is a plain text file
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| 13 | which will also accept certain Escape sequences (see below) in order to
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| 14 | insert information about the system. There is also the file
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| 15 | <filename>issue.net</filename> which can be used when logging on remotely.
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| 16 | <command>ssh</command> however, will only use it if you set the option in the
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| 17 | configuration file and will also <emphasis>not</emphasis> interpret the
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| 18 | escape sequences as shown below.</para>
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| 19 |
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| 20 | <para>One of the most common things which people want to do is to clear
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| 21 | the screen at each logon. The easiest way of doing that is to put a
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| 22 | "clear" escape into <filename>/etc/issue</filename>. A simple way of doing
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| 23 | this is to do <userinput><command>clear > /etc/issue</command></userinput>.
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| 24 | This will insert the relevant escape code into the start of the
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| 25 | <filename>/etc/issue</filename> file. Note that if you do this, when
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| 26 | you edit the file, you should leave the ^[c character on
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| 27 | the first line alone.</para>
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| 28 |
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| 29 | <para>The following escapes are recognized by agetty (the program which
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| 30 | usually parses <filename>/etc/issue</filename>). This information is from
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| 31 | <command>man agetty</command> where you can find extra information
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| 32 | about the logon process.</para>
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| 33 |
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| 34 | <para>The <filename>issue</filename> file can contain certain escape codes to
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| 35 | display various information. All escape codes consist of a backslash
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| 36 | (\) immediately followed by one of the letters explained
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| 37 | below (so \d in <filename>/etc/issue</filename> would
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| 38 | insert the current date).</para>
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| 39 |
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| 40 | <screen>b Insert the baudrate of the current line.
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| 41 | d Insert the current date.
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| 42 | s Insert the system name, the name of the operating system.
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| 43 | l Insert the name of the current tty line.
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| 44 | m Insert the architecture identifier of the machine, e.g. i486
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| 45 | n Insert the nodename of the machine, also known as the hostname.
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| 46 | o Insert the domainname of the machine.
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| 47 | r Insert the release number of the kernel, e.g. 2.4.16.
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| 48 | t Insert the current time.
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| 49 | u Insert the number of current users logged in.
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| 50 | U Insert the string "1 user" or "<n> users" where <n> is the
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| 51 | number of current users logged in.
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| 52 | v Insert the version of the <acronym>OS</acronym>, e.g. the build-date etc.</screen>
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| 53 |
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| 54 | </sect1>
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| 55 |
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