Processes & Background Jobs
Running a Command in the Background long_task.sh & # runs in the background, script continues immediately echo "Started with PID …
Jan 20, 2026
Read more
Processes
4 articles
Processes & Jobs
What Is a Process? A process is a running instance of a program — it has its own PID (process ID), memory space, open file descriptors, and …
Jan 20, 2026
Read more
Zombie & Defunct Processes
Overview A zombie (shown as Z or <defunct> in ps) is a process that has already finished executing but whose exit status hasn’t …
Jan 20, 2026
Read more
Process & Job Commands
Viewing Running Processes ps aux # every process on the system, BSD-style ps -ef # every process, standard/POSIX-style ps -ef --forest # …
Jan 20, 2026
Read more