linux 系统中查看进程的命令有 ps、top、pstree……还有一些各种显示的监控工具程序。
一个进程运行中，很可能会有其他的子进程随之运行，而使用 pstree 命令就可以非常清楚简洁的看到这些子进程与父进程的关系了。
pstree 命令直接使用，将显示系统中的进程树，可以清晰的显示出系统中的进程结构。
[root@searu ~]# pstree
pstree 命令直接使用时显示系统中的进程树
Usage: pstree [-a] [-c] [-h | -H PID] [-l] [-n] [-p] [-u]
[-A | -G | -U] [PID | USER]
pstree -V
Display a tree of processes.
-a show command line arguments
-A use ASCII line drawing characters
-c don't compact identical subtrees
-h highlight current process and its ancestors
-H PID highlight this process and its ancestors
-G use VT100 line drawing characters
-l don't truncate long lines
-n sort output by PID
-p show PIDs; implies -c
-u show uid transitions
-U use UTF-8 (Unicode) line drawing characters
-V display version information
-Z show SELinux security contexts
PID start at this PID; default is 1 (init)
USER show only trees rooted at processes of this user
正文完