PSTREE(1)							   User Commands							 PSTREE(1)

NAME

       pstree - display a tree of processes

SYNOPSIS

       pstree [-a, --arguments] [-c, --compact] [-h, --highlight-all, -Hpid, --highlight-pid pid] [-g] --show-pgids] [-l, --long]
       [-n, --numeric-sort] [-N, --ns-sortns [-p, --show-pids] [-s, --show-parents] [-S, --ns-changes] [-u, --uid-changes] [-Z, --security-con-
       text] [-A, --ascii, -G, --vt100, -U, --unicode] [pid, user]
       pstree -V, --version

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 repetition 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 processes. 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 for processes but not threads.

       -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 highlighting 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.

       -g     Show PGIDs.  Process Group IDs are shown as decimal numbers in parentheses after each process name.   -p	implicitly  disables  com-
	      paction.	If both PIDs and PGIDs are displayed then PIDs are shown first.

       -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.)

       -N     Show individual trees for each namespace of the type specified.  The available types are: ipc, mnt, net, pid,  user,  uts.   Regular
	      users don't have access to other users' processes information, so the output will be limited.

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

       -s     Show parent processes of the specified process.

       -S     Show namespaces transitions.  Like -N, the output is limited when running as a regular user.

       -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
	      ' 33%8' and left with echo -e ' 33%@'

       -V     Display version information.

       -Z     (SELinux) Show security context for each process.  This flag will only work if pstree is compilied with SELinux support.

FILES

       /proc  location of the proc file system

BUGS

       Some character sets may be incompatible with the VT100 characters.

SEE ALSO

       ps(1), top(1).

psmisc								    2012-07-28								 PSTREE(1)