source: postlfs/config/logon.xml@ 86af98a

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
   "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;
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<sect1 id="postlfs-config-logon" xreflabel="Customizing your Logon with /etc/issue">
<sect1info>
<othername>$LastChangedBy$</othername>
<date>$Date$</date>
</sect1info>
<?dbhtml filename="logon.html"?>
<title>Customizing your Logon with /etc/issue</title>
<indexterm zone="postlfs-config-logon">
<primary sortas="e-etc-issue">/etc/issue</primary></indexterm>

<para>When you first boot up your new <acronym>LFS</acronym> system, the logon 
screen will be nice and plain (as it should be in a bare-bones system).  Many 
people however, will want their system to display some information in the logon 
message.  This can be accomplished using the 
file <filename>/etc/issue</filename>.</para>

<para>The <filename>/etc/issue</filename> file is a plain text file
which will also accept certain Escape sequences (see below) in order to
insert information about the system.  There is also the file
<filename>issue.net</filename> which can be used when logging on remotely.  
<command>ssh</command> however, will only use it if you set the option in the 
configuration file and will also <emphasis>not</emphasis> interpret the 
escape sequences shown below.</para>

<para>One of the most common things which people want to do is to clear
the screen at each logon.  The easiest way of doing that is to put a
"clear" escape-sequence into <filename>/etc/issue</filename>.  A simple way of 
doing this is to do <userinput><command>clear &gt; 
/etc/issue</command></userinput>.  
This will insert the relevant escape code into the start of the
<filename>/etc/issue</filename> file.  Note that if you do this, when
you edit the file, you should leave the ^[c character on 
the first line alone.</para>

<para>The following escapes are recognized by agetty (the program which
usually parses <filename>/etc/issue</filename>).  This information is from
<command>man agetty</command> where you can find extra information
about the logon process.</para>

<para>The <filename>issue</filename> file can contain certain escape codes to 
display various information.  All escape codes consist of a backslash
(\) immediately followed by one of the letters explained 
below (so <option>\d</option> in <filename>/etc/issue</filename> would 
insert the current date).</para>

<screen>b   Insert the baudrate of the current line.
d   Insert the current date.
s   Insert the system name, the name of the operating system.
l   Insert the name of the current tty line.
m   Insert the architecture identifier of the machine, e.g., i486
n   Insert the nodename of the machine, also known as the hostname.
o   Insert the domainname of the machine.
r   Insert the release number of the kernel, e.g., 2.4.16.
t   Insert the current time.
u   Insert the number of current users logged in.
U   Insert the string "1 user" or "&lt;n&gt; users" where &lt;n&gt; is the
    number of current users logged in.
v   Insert the version of the <acronym>OS</acronym>, e.g., the build-date etc.</screen>

</sect1>