ps

查询在跑sh进程like a tree

ps -f -g<PID>

the reasult like the following :

 PID TTY      STAT   TIME COMMAND
28460 pts/26   Ss     0:00 bash
29214 pts/26   R+     0:00  \_ ps -f -g
 3595 pts/25   Ss+    0:00 bash
21542 pts/24   Ss+    0:00 bash
15776 pts/23   Ss+    0:00 bash
11269 pts/22   Ss+    0:00 bash
11059 pts/21   Ss+    0:00 bash
19306 pts/20   Ss+    0:00 bash
19190 pts/19   Ss+    0:00 bash
 3609 pts/18   Ss+    0:00 bash
 3059 pts/2    Ss+    0:00 bash
 2185 pts/3    Ss+    0:00 bash
 1444 tty2     Ssl+   0:00 /usr/lib/gdm3/gdm-x-session --run-script gnome-session --session=ubuntu
 1446 tty2     Rl+  214:16  \_ /usr/lib/xorg/Xorg vt2 -displayfd 3 -auth /run/user/1000/gdm/Xauthority -bac
 1450 tty2     S+     0:00  \_ dbus-daemon --print-address 4 --session
 1453 tty2     S+     0:00  \_ /sbin/upstart --user