docker.softwareshinobi.com/docs/Linux-Commands/.recycle/094-the-pstree-command.md

The pstree command

The pstree command is similar to ps, but instead of listing the running processes, it shows them as a tree. The tree-like format is sometimes more suitable way to display the processes hierarchy which is a much simpler way to visualize running processes. The root of the tree is either init or the process with the given pid.

Examples

1. To display a hierarchical tree structure of all running processes:

pstree

2. To display a tree with the given process as the root of the tree:

pstree [pid]

3. To show only those processes that have been started by a user:

pstree [USER]

4. To show the parent processes of the given process:

pstree -s [PID]

5. To view the output one page at a time, pipe it to the less command:

pstree | less

Syntax

ps [OPTIONS] [USER or PID]

Additional Flags and their Functionalities

Short Flag	Long Flag	Description
-a	--arguments	Show command line arguments
-A	--ascii	use ASCII line drawing characters
-c	--compact	Don't compact identical subtrees
-h	--highlight-all	Highlight current process and its ancestors
-H PID	--highlight-pid=PID	highlight this process and its ancestors
-g	--show-pgids	show process group ids; implies -c
-G	--vt100	use VT100 line drawing characters
-l	--long	Don't truncate long lines
-n	--numeric-sort	Sort output by PID
-N type	--ns-sort=type	Sort by namespace type (cgroup, ipc, mnt, net, pid, user, uts)
-p	--show-pids	show PIDs; implies -c
-s	--show-parents	Show parents of the selected process
-S	--ns-changes	show namespace transitions
-t	--thread-names	Show full thread names
-T	--hide-threads	Hide threads, show only processes
-u	--uid-changes	Show uid transitions
-U	--unicode	Use UTF-8 (Unicode) line drawing characters
-V	--version	Display version information
-Z	--security-context	Show SELinux security contexts