Master Linux Process Management: Essential ps Command Techniques
This guide walks you through the Linux ps command, covering basic usage, common options for listing all processes, filtering by user, CPU or memory usage, process name, PID, threads, tree view, security details, root‑specific formatting, and real‑time monitoring with watch.
1. What is ps?
The ps command displays a snapshot of current processes, allowing you to see which processes are running, their status, whether they have terminated or become zombies, and which ones consume excessive resources.
ps shows an instantaneous view; for continuous monitoring use top .
2. What does ps output without parameters?
Running ps with no options prints four columns:
PID – process identifier
TTY – terminal where the command runs
TIME – CPU time used
CMD – command name
The list is unsorted.
3. How to display all current processes?
Use the -a option (all) and combine with -x to include processes without a controlling terminal: $ ps -ax For long output pipe to less:
$ ps -ax | lessSigned-in readers can open the original source through BestHub's protected redirect.
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