Signals and process termination

Articles

• Processes — Viewing processes, signals and priorities; finding the processes that hog CPU or memory.
• ps — list processes — The ps command lists running processes with PID, owner, state, CPU and memory use, and the command line.
• kill — send a signal to a process — The kill command sends a signal to a PID — ask it to exit (TERM), reload settings (HUP), or end it at once (KILL).
• pgrep — find a process PID by name — The pgrep command prints the PIDs of processes by name or command line, owner and parent — no ps or grep needed.
• Background jobs in the shell — &, jobs, nohup — Running things in the background, shell job control, surviving logout.