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git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@1249 af4574ff-66df-0310-9fd7-8a98e5e911e0
56 lines
2.7 KiB
XML
56 lines
2.7 KiB
XML
<sect1 id="postlfs-config-logon">
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<?dbhtml filename="logon.html" dir="postlfs"?>
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<title>/etc/issue (Customizing your logon)</title>
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<para>When you first boot up your new <acronym>LFS</acronym> system, the logon
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screen will
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be nice and plain (as it should be in a bare-bones system). Many people
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however, will want their system to display some information in the logon
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message. This can be accomplished using the
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file <filename>/etc/issue</filename>.</para>
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<para>The <filename>/etc/issue</filename> file is a plain text file
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which will also accept certain Escape sequences (see below) in order to
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insert information about the system. There is also the file
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<filename>issue.net</filename> which can be used when logging on remotely.
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<command>ssh</command> however, will only use it if you set the option in the
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configuration file and will also <emphasis>not</emphasis> interpret the
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escape sequences shown below.</para>
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<para>One of the most common things which people want to do is to clear
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the screen at each logon. The easiest way of doing that is to put a
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"clear" escape-sequence into <filename>/etc/issue</filename>. A simple way of doing
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this is to do <userinput><command>clear > /etc/issue</command></userinput>.
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This will insert the relevant escape code into the start of the
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<filename>/etc/issue</filename> file. Note that if you do this, when
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you edit the file, you should leave the ^[c character on
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the first line alone.</para>
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<para>The following escapes are recognized by agetty (the program which
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usually parses <filename>/etc/issue</filename>). This information is from
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<command>man agetty</command> where you can find extra information
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about the logon process.</para>
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<para>The <filename>issue</filename> file can contain certain escape codes to
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display various information. All escape codes consist of a backslash
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(\) immediately followed by one of the letters explained
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below (so <option>\d</option> in <filename>/etc/issue</filename> would
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insert the current date).</para>
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<screen>b Insert the baudrate of the current line.
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d Insert the current date.
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s Insert the system name, the name of the operating system.
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l Insert the name of the current tty line.
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m Insert the architecture identifier of the machine, e.g. i486
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n Insert the nodename of the machine, also known as the hostname.
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o Insert the domainname of the machine.
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r Insert the release number of the kernel, e.g. 2.4.16.
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t Insert the current time.
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u Insert the number of current users logged in.
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U Insert the string "1 user" or "<n> users" where <n> is the
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number of current users logged in.
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v Insert the version of the <acronym>OS</acronym>, e.g. the build-date etc.</screen>
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</sect1>
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