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PROGRAM:

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-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.

-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. -g implicitly disables compaction. If both PIDs and PGIDs are
displayed then PIDs are shown first.

-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.

-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.

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