Processes

ps -aux

Full information on all running processes.

USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  0.0  0.0 191424  4420 ?        Ss    2019  63:30 /usr/lib/systemd/systemd --switched-root --system --deserialize 22
root         2  0.0  0.0      0     0 ?        S     2019   0:09 [kthreadd]
root         3  0.0  0.0      0     0 ?        S     2019   5:28 [ksoftirqd/0]
root         5  0.0  0.0      0     0 ?        S<    2019   0:00 [kworker/0:0H]
root         7  0.0  0.0      0     0 ?        S     2019   0:05 [migration/0]
root         8  0.0  0.0      0     0 ?        S     2019   0:00 [rcu_bh]
root         9  0.1  0.0      0     0 ?        S     2019 341:06 [rcu_sched]
root        10  0.0  0.0      0     0 ?        S<    2019   0:00 [lru-add-drain]

kill <pid>

Send the TERM signal (usually 9) to the process with PID-<pid>

killall <commandname>

Kill all processes with the name <commandname> this is the name as shown by ps -ef or ps -aux without any options or parameters.

nohup <cmd> &

Run <cmd> in the background with no connection to the terminal. Closing the terminal does not stop the command from running. All output is sent do a nohup.out file in the current directory.

jobs

Show the processes belonging to yours.

For a command running on your terminal with CRTL-z you pause the process and are returned to the bash prompt.

bg

Put the process in the background, it starts running again

disown

Disconnect the process from the parent. You can not close the terminal without stopping the process. You cannot see this process with jobs anymore.

ps -u $USER -f

Show all processes for your username (-f for full format)