# Kill by PID
kill PID                # Send TERM signal (15)
kill -9 PID             # Send KILL signal (forceful)
kill -15 PID            # Send TERM signal (graceful)
# Kill by name
killall process_name    # Kill all processes with name
pkill pattern           # Kill processes matching pattern
# Common signals
kill -l                 # List all signals
kill -HUP PID          # Reload configuration (1)
kill -INT PID          # Interrupt (2)
kill -QUIT PID         # Quit (3)
kill -KILL PID         # Force kill (9)
kill -TERM PID         # Terminate (15)
kill -STOP PID         # Stop process (19)
kill -CONT PID         # Continue process (18)