process management

pid,ppid,cmd

ps

ps -f to show parent pid

ps -ef to show all process

you can trace process fork order through ppid...

ps -ef | grep bash

ps -l

ps ax

ps ax | head

ls -l /proc

pstree | head -20

top to check top processes running the system.

top: click h key to show all tips.

kill -1 1234

signal 1,2,3,15,9

killall -9 procname