NAME

       pstree - display a tree of processes

SYNOPSIS

       pstree [-a, --arguments] [-c, --compact-not] [-C, --color attr] [-g, --show-pgids]
       [-h, --highlight-all, -Hpid, --highlight-pid pid] [-l, --long] [-n, --numeric-sort] [-N, --ns-sort ns]
       [-p, --show-pids] [-s, --show-parents] [-S, --ns-changes] [-t, --thread-names] [-T, --hide-threads]
       [-u, --uid-changes] [-Z, --security-context] [-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.

       -C     Color  the  process  name  by  given  attribute. Currently pstree only accepts age which colors by
              process age.  Processes newer than 60 seconds are  green,  newer  than  an  hour  yellow  and  the
              remaining red.

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

       -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.

       -l     Display long lines.  By default, lines are truncated to either the COLUMNS environment variable or
              the display width.  If neither of these methods work, the default of 132 columns is used.

       -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.

       -t     Show full names for threads when available.

       -T     Hide threads and only show processes.

       -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  compiled
              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).