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+.\"
+.\" Copyright 1993-2002 Werner Almesberger
+.\"           2002-2016 Craig Small
+.\" This program is free software; you can redistribute it and/or modify
+.\" it under the terms of the GNU General Public License as published by
+.\" the Free Software Foundation; either version 2 of the License, or
+.\" (at your option) any later version.
+.\"
+.TH PSTREE 1 "2016-06-18" "psmisc" "User Commands"
+.SH NAME
+pstree \- display a tree of processes
+.SH SYNOPSIS
+.ad l
+.B pstree
+.RB [ \-a  , \ \-\-arguments ]
+.RB [ \-c  , \ \-\-compact ]
+.RB [ \-h  , \ \-\-highlight\-all  , \ \-H \fIpid\fB  , \ \-\-highlight\-pid\ \fIpid\fB ]
+.RB [ \-g  ] \ \-\-show\-pgids ]
+.RB [ \-l  , \ \-\-long ]
+.RB [ \-n  , \ \-\-numeric\-sort ]
+.RB [ \-N  , \ \-\-ns\-sort \fIns\fB
+.RB [ \-p  , \ \-\-show\-pids ]
+.RB [ \-s  , \ \-\-show\-parents ]
+.RB [ \-S  , \ \-\-ns-changes ]
+.RB [ \-t  , \ \-\-thread-names ]
+.RB [ \-T  , \ \-\-hide-threads ]
+.RB [ \-u  , \ \-\-uid\-changes ]
+.RB [ \-Z  , \ \-\-security\-context ]
+.RB [ \-A  , \ \-\-ascii  , \ \-G  , \ \-\-vt100  , \ \-U  , \ \-\-unicode ]
+.RB [ \fIpid\fB  , \ \fIuser\fB]
+.br
+.B pstree
+.RB \-V  , \ \-\-version
+.ad b
+.SH DESCRIPTION
+.B pstree
+shows running processes as a tree.  The tree is rooted at either
+.I pid
+or
+.B init
+if
+.I pid
+is omitted.  If a user name is specified, all process trees rooted at
+processes owned by that user are shown.
+.PP
+.B pstree
+visually merges identical branches by putting them in square brackets
+and prefixing them with the repetition count, e.g.
+.nf
+.sp
+    init\-+\-getty
+         |\-getty
+         |\-getty
+         `\-getty
+.sp
+.fi
+becomes
+.nf
+.sp
+    init\-\-\-4*[getty]
+.sp
+.fi
+.PP
+.PP
+Child threads of a process are found under the parent process and are
+shown with the process name in curly braces, e.g.
+.nf
+.sp
+    icecast2\-\-\-13*[{icecast2}]
+.sp
+.fi
+.PP
+If
+.B pstree
+is called as
+.B 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
+.B pstree
+is run in a xterminal.
+.PP
+Certain kernel or mount parameters, such as the hidepid option for procfs,
+will hide information for some processes. In these situations
+.B pstree
+will attempt to build the tree without this information, showing process
+names as question marks.
+
+.SH OPTIONS
+.IP \fB\-a\fP
+Show command line arguments.  If the command line of a process is
+swapped out, that process is shown in parentheses.
+.B \-a
+implicitly disables compaction for processes but not threads.
+.IP \fB\-A\fP
+Use ASCII characters to draw the tree.
+.IP \fB\-c\fP
+Disable compaction of identical subtrees.  By default, subtrees are
+compacted whenever possible.
+.IP \fB\-G\fP
+Use VT100 line drawing characters.
+.IP \fB\-h\fP
+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.
+.IP \fB\-H\fP
+Like
+.BR \-h ,
+but highlight the specified process instead.  Unlike with
+.BR \-h ,
+.B pstree
+fails when using
+.B \-H
+if highlighting is not
+available.
+.IP \fB\-g\fP
+Show PGIDs.  Process Group IDs are shown as decimal numbers in
+parentheses after each process name.
+.B \-g
+implicitly disables compaction.  If both PIDs and PGIDs are displayed
+then PIDs are shown first.
+.IP \fB\-l\fP
+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.
+.IP \fB\-n\fP
+Sort processes with the same ancestor by PID instead of by name. 
+(Numeric sort.)
+.IP \fB\-N\fP
+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.
+.IP \fB\-p\fP
+Show PIDs.  PIDs are shown as decimal numbers in parentheses after each
+process name.
+.B \-p
+implicitly disables compaction.
+.IP \fB\-s\fP
+Show parent processes of the specified process.
+.IP \fB\-S\fP
+Show namespaces transitions.  Like \-N, the output is limited when running
+as a regular user.
+.IP \fB\-t\fP
+Show full names for threads when available.
+.IP \fB\-T\fP
+Hide threads and only show processes.
+.IP \fB\-u\fP
+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.
+.IP \fB\-U\fP
+Use UTF-8 (Unicode) line drawing characters.  Under Linux 1.1-54 and
+above, UTF-8 mode is entered on the console with
+.B echo \-e '\\033%8'
+and left with
+.B echo \-e '\\033%@'
+.IP \fB\-V\fP
+Display version information.
+.IP \fB\-Z\fP
+(SELinux) Show security context for each process.  This flag will only
+work if pstree is compiled with SELinux support.
+.SH FILES
+.TP
+/proc
+location of the proc file system
+.SH BUGS
+Some character sets may be incompatible with the VT100 characters.
+.SH "SEE ALSO"
+.BR ps (1),
+.BR top (1).
+.\"{{{}}}