Linux – How to Use nice and renice Commands

In this video I show how to use the nice and renice commands on Linux. You will learn what niceness means, the allowed priority range (-20 to 19), how to start a process with a specified niceness using nice -n, how to check niceness with ps -o pid,comm,nice, and how to change the priority of a running process using sudo renice. I demonstrate examples with background jobs (ampersand), explain permission requirements for negative niceness, and show what happens when values are out of range. Works the same on common distros like Ubuntu, Debian, CentOS and Fedora.

How to use nice and renice commands on Linux?
How to set process priority with nice -n on Linux?
How to change priority of a running process with renice on Linux?

0:00 Intro — what we will cover
0:10 Open terminal and quick overview of nice vs renice
0:18 What are nice and renice — priority and niceness explained
0:40 Priority range (-20 highest to 19 lowest) and default 0
0:55 Check niceness with ps -o pid,comm,nice
1:10 Start a background sleep process and see default niceness
1:30 Start process with nice -n 15 (example) and verify
3:10 Use sudo renice to change a running process to -10 (renice -n -10 -p PID)
4:25 Verify changed priority and niceness
4:32 Example: setting niceness above range (40 becomes 19)
5:23 Example: trying very low niceness (-100) and permission denied notes
6:48 Wrap up, recommendations and final tips

#Linux #nice #renice #ProcessPriority

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