$ ps -ef | grep "sleep"
user       2470  1996  0 06:30 pts/1    00:00:00 sleep 60

$ ps -ef | grep 1996
user       1996  1995  0 05:57 pts/1    00:00:00 bash

$ ps -ef | grep 1995
user       1995   448  0 05:57 tty1     00:00:00 /usr/bin/urxvt