Processes (Unix)

Display current processes

-e: all processes, -f: full format, -C command name, -u username

ps -ef

Filter by command

ps -fC <command list>
ps -fC nmap
ps -fC nmap,bash

Filter on user

ps -fu <user list>
ps -fu kali

Kill a process

kill <process ID>
kill 1234

Force kill

kill -9 <process ID>

CPU intensive processes

ps -ef | sort +3 -r | head -n 10

Background a process

<command> &
sudo nmap -T1 -sS -p 1-65535 127.0.0.1 &

Jobs running in current terminal session

jobs

Bring the job to foreground

fg

fg %<job ID, or PID, or beginning of command, or %+ or %% for current job, or %- for previous job>
fg %1

Suspend a process running

Press Ctrl + Z

Resume a process in the background

Be careful if the job is time sensitive, it could give wrong results.

bg

Cancel a process running

Press Ctrl + C