Imagine you have a text file that contains output of ps -ef. (you forgot to add --headers option) UID PID PPID C STIME TTY TIME CMD root 1 0 0 Apr02 ? 00:00:56 /sbin/init root 2 0 0 Apr02 ? 00:00:00 [kthreadd] root 3 2 0 Apr02 ? 00:00:00 [rcu_gp] root 4 2 0 Apr02 ? 00:00:00 [rcu_par_gp] root 6 2 0 …
