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PSTREE(1)                                   User Commands                                  PSTREE(1)



NAME
       pstree - display a tree of processes

SYNOPSIS
       pstree [-a, --arguments] [-c, --compact-not] [-C, --color attr] [-g, --show-pgids]
       [-h, --highlight-all, -H pid, --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 informa‐
       tion 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 the value 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 dis‐
              played 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 ances‐
              tors 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 parent 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, time, 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 par‐
              ent, 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     Show  the current security attributes of the process. For SELinux systems this will be
              the security context.

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), proc(5).



psmisc                                       2021-01-05                                    PSTREE(1)