lfs-book/appendixa/psmisc-desc.xml

<sect2><title>Short descriptions</title>

<para><command>fuser</command> reports the PIDs of processes that use
the given files or filesystems.</para>

<para><command>killall</command> kills processes by name. It sends a signal
to all processes running any of the given commands.</para>

<para><command>pstree</command> displays running processes as a tree.</para>

<para><command>pstree.x11</command> same as pstree except that it waits for
confirmation before exiting.</para>

</sect2>