§comnand history
•HISTSIZE
•r: run previous command
•fc -s 4: rerun 4th command
•r 15: run command no 15 in command fils
•r string: run most recend command starting with strinq
•r old=new
•r old=new string
•fc -l 27 34: list commands 27 to 34
•set FCEDIT for default editor
•fc -e 27 34: edit 27 to 34
•fc -e vi 27: edit 27 then execute
§job control
•ctl-c
•ctl-z: suspend job use fg/bg to resume
•bg: move job to background
•cmd &: run job in background
•jobs -l
•fg job-no: bring job to foreground
•kill pid
•kill -1 pid
•kill -9 pid
•ps: list process