ps -p

#!/bin/bash

if [ $# -eq 0 ]
then
    echo "Usage: $0 <process PID>"
    echo "Checks if a process is running by its PID."
    exit 1
fi

# Get the PID of the process to check from the command line argument
process_pid=$1

# Check if the process is running
if ps -p $process_pid > /dev/null
then
    echo "Process with PID $process_pid is running."
else
    echo "Process with PID $process_pid is not running. Running tput bel..."
    while true; do tput bel; sleep 1; done
fi

See also

• Process, zombie process, fork, thread: ps, tree, pstree, ps axf, proc, pwdx, which, watch, sar -q, tload, uptime, Interrupts, pgrep, tasklist (Windows), Zombie process, pstack, docker ps, docker-compose ps, jobs, acct, process mrelease, pidstat, IPC, pidof