display a tree of processes
see also :
ps - top
[-h, --highlight-all, -Hpid, --highlight-pid pid]
[-A, --ascii, -G, --vt100, -U, --unicode]
pstree -V, --version
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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.
visually merges identical branches by putting them in square
brackets and prefixing them with the repetition count,
of a process are found under the parent process and are
shown with the process name in curly braces, e.g.
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.
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
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.
Use ASCII characters to draw the tree.
Disable compaction of identical subtrees. By default,
subtrees are compacted whenever possible.
Use VT100 line drawing characters.
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.
Like -h, but highlight the specified
process instead. Unlike with -h, pstree
fails when using -H if highlighting is not
Show PGIDs. Process Group IDs are shown as decimal
numbers in parentheses after each process name.
-p implicitly disables compaction. If both PIDs
and PGIDs are displayed then PIDs are shown first.
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.
Sort processes with the same ancestor by PID instead of
by name. (Numeric sort.)
Show PIDs. PIDs are shown as decimal numbers in
parentheses after each process name. -p
implicitly disables compaction.
Show parent processes of the specified process.
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.
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%@’
Display version information.
(SELinux) Show security context for each process. This
flag will only work if pstree is compilied with SELinux
location of the proc file system
sets may be incompatible with the VT100 characters.