lfs-book/appendixa/shellutils-desc.xml

<sect2>
<title>Contents</title>

<para>
The Shellutils package contains the basename, chroot, date, dirname,
echo, env, expr, factor, false, groups, hostid, hostname, id, logname,
nice, nohup, pathchk, pinky, printenv, printf, pwd, seq, sleep, stty,
su, tee, test, true, tty, uname, uptime, users, who, whoami and yes
programs.
</para>

</sect2>

<sect2><title>Description</title>

<sect3><title>basename</title>

<para>
basename strips directory and suffixes from filenames.
</para>

</sect3>

<sect3><title>chroot</title>

<para>
chroot runs a command or interactive shell with special root directory.
</para>

</sect3>

<sect3><title>date</title>

<para>
date displays the current time in a specified format, or sets the system 
date.
</para>

</sect3>

<sect3><title>dirname</title>

<para>
dirname strips non-directory suffixes from file name.
</para>

</sect3>

<sect3><title>echo</title>

<para>
echo displays a line of text.
</para>

</sect3>

<sect3><title>env</title>

<para>
env runs a program in a modified environment.
</para>

</sect3>

<sect3><title>expr</title>

<para>
expr evaluates expressions.
</para>

</sect3>

<sect3><title>factor</title>

<para>
factor prints the prime factors of all specified integer numbers.
</para>

</sect3>

<sect3><title>false</title>

<para>
false always exits with a status code indicating failure.
</para>

</sect3>

<sect3><title>groups</title>

<para>
groups prints the groups a user is in.
</para>

</sect3>

<sect3><title>hostid</title>

<para>
hostid prints the numeric identifier (in hexadecimal) for the current 
host.
</para>

</sect3>

<sect3><title>hostname</title>

<para>
hostname sets or prints the name of the current host system
</para>

</sect3>

<sect3><title>id</title>

<para>
id prints the real and effective UIDs and GIDs of a user or the current
user.
</para>

</sect3>

<sect3><title>logname</title>

<para>
logname prints the current user's login name.
</para>

</sect3>

<sect3><title>nice</title>

<para>
nice runs a program with modified scheduling priority.
</para>

</sect3>

<sect3><title>nohup</title>

<para>
nohup runs a command immune to hangups, with output to a non-tty
</para>

</sect3>

<sect3><title>pathchk</title>

<para>
pathchk checks whether file names are valid or portable.
</para>

</sect3>

<sect3><title>pinky</title>

<para>
pinky is a lightweight finger utility which retrieves information about
a certain user
</para>

</sect3>

<sect3><title>printenv</title>

<para>
printenv prints all or part of the environment.
</para>

</sect3>

<sect3><title>printf</title>

<para>
printf formats and print data (the same as the printf C function).
</para>

</sect3>

<sect3><title>pwd</title>

<para>
pwd prints the name of the current/working directory
</para>

</sect3>

<sect3><title>seq</title>

<para>
seq prints numbers in a certain range with a certain increment.
</para>

</sect3>

<sect3><title>sleep</title>

<para>
sleep delays for a specified amount of time.
</para>

</sect3>

<sect3><title>stty</title>

<para>
stty changes and prints terminal line settings.
</para>

</sect3>

<sect3><title>su</title>

<para>
su runs a shell with substitute user and group IDs
</para>

</sect3>

<sect3><title>tee</title>

<para>
tee reads from standard input and write to standard output and files.
</para>

</sect3>

<sect3><title>test</title>

<para>
test checks file types and compares values.
</para>

</sect3>

<sect3><title>true</title>

<para>
True always exits with a status code indicating success.
</para>

</sect3>

<sect3><title>tty</title>

<para>
tty prints the file name of the terminal connected to standard input.
</para>

</sect3>

<sect3><title>uname</title>

<para>
uname prints system information.
</para>

</sect3>

<sect3><title>uptime</title>

<para>
uptime tells how long the system has been running.
</para>

</sect3>

<sect3><title>users</title>

<para>
users prints the user names of users currently logged in to the 
current host.
</para>

</sect3>

<sect3><title>who</title>

<para>
who shows who is logged on.
</para>

</sect3>

<sect3><title>whoami</title>

<para>
whoami prints the users effective userid.
</para>

</sect3>

<sect3><title>yes</title>

<para>
yes outputs a string repeatedly until killed.
</para>

</sect3>

</sect2>