ps
Display your currently running processes
ps -ef
Display all the currently running processes on the
system.
ps -ef | grep processname
Display process information for processname
top
Display and manage the top processes
htop
Interactive process viewer (top alternative)
kill pid
Kill process with process ID of pid
killall processname
Kill all processes named processname
program &
Start program in the background
bg
Display stopped or background jobs
fg
Brings the most recent background job to
foreground
fg n
Brings job n to the foreground
nohup processname
Runs a process even after user logs out