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PSTREE(1)                        User Commands                       PSTREE(1)



NAME
       pstree - display a tree of processes

SYNOPSIS
       pstree [-a] [-c] [-h|-Hpid] [-l] [-n] [-p] [-u] [-Z] [-A|-G|-U] [pid|user]
       pstree -V

DESCRIPTION
       pstree shows running processes as a tree. The tree is rooted at either pid or init if pid is omitted. If a user
       name is specified, all process trees rooted at processes owned by that user are shown.

       pstree visually merges identical branches by putting them in square brackets and prefixing them with the  repe-
       tition count, e.g.

           init-+-getty
                |-getty
                |-getty
                '-getty

       becomes

           init---4*[getty]



       Child  threads  of  a  process  are found under the parent process and are shown with the process name in curly
       braces, e.g.

           icecast2---13*[{icecast2}]


       If pstree is called as pstree.x11 then it will prompt the user at the end of the line to press return and  will
       not return until that has happened. This is useful for when pstree is run in a xterminal.

       Certain  kernel or mount parameters, such as the hidepid option for procfs, will hide information for some pro-
       cesses. In these situations pstree will attempt to build the tree without  this  information,  showing  process
       names as question marks.


OPTIONS
       -a     Show  command  line arguments. If the command line of a process is swapped out, that process is shown in
              parentheses. -a implicitly disables compaction.

       -A     Use ASCII characters to draw the tree.

       -c     Disable compaction of identical subtrees. By default, subtrees are compacted whenever possible.

       -G     Use VT100 line drawing characters.

       -h     Highlight the current process and its ancestors. This is a no-op if the terminal doesn't  support  high-
              lighting or if neither the current process nor any of its ancestors are in the subtree being shown.

       -H     Like  -h,  but  highlight  the  specified process instead. Unlike with -h, pstree fails when using -H if
              highlighting is not available.

       -l     Display long lines. By default, lines are truncated to the display width or 132 if output is sent  to  a
              non-tty or if the display width is unknown.

       -n     Sort processes with the same ancestor by PID instead of by name. (Numeric sort.)

       -p     Show  PIDs. PIDs are shown as decimal numbers in parentheses after each process name. -p implicitly dis-
              ables compaction.

       -u     Show uid transitions. Whenever the uid of a process differs from the uid of its parent, the new  uid  is
              shown in parentheses after the process name.

       -U     Use  UTF-8 (Unicode) line drawing characters. Under Linux 1.1-54 and above, UTF-8 mode is entered on the
              console with echo -e '\033%8' and left with echo -e '\033%@'

       -V     Display version information.

       -Z     (SELinux) Show security context for each process.

FILES
       /proc     location of the proc file system

AUTHORS
       Werner Almesberger <wernerATalmesberger.net> Craig Small <csmallATsmall.au>

BUGS
       Some character sets may be incompatible with the VT100 characters.


SEE ALSO
       ps(1), top(1).



Linux                             2004-11-09                         PSTREE(1)