`renice`

Adjust the priorities of running processes (POSIX)

Syntax:

renice prioritylevel [-g pgrp...] 
       [-p pid...] [-u user...]

Options:

-g pgrp: Renice processes in this process group.
-p pid: Renice this process.
-u user: Renice processes owned by this user.
prioritylevel: The amount to adjust the priority by. Positive numbers lower the priority by that many full priority levels, while negative numbers raise the priority.

Description:

The renice utility adjusts the priority of one or more running processes. The specified prioritylevel is subtracted from the current priority of each selected process.

If you enter a:	`renice`:
Positive value (e.g. `2` or `+2`)	Lowers the priority of a process, making it "nicer" to other processes
Negative value (e.g. `-2`)	Raises the priority of a process, making it "meaner" to other processes

You can adjust the priority as follows:

If you're:	You can change to any priority:
A non-`root` user	From 1 to 63
`root`	From 1 to 255

If you don't have the appropriate privileges, you can renice only the processes you own. You can change the range of privileged priorities with the -P option for procnto.

Examples:

Lower the priority of process 768 by 2:

renice 2 -p 768

Exit status:

0: Successful completion.
> 0: An error occurred.

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