How to use nice command?

Shell Programming and Scripting
1

Dear Friends,

I have a directory when i take du of that directory it takes alot of memory and cpu and I/O, i want to use nice to run my script that have du command slowly so it won't take I/O and cpu, please suggest.

2 
man nice

is just one page long.

nice /path/to/myscript.sh

or

nice -n 15 /path/to/myscript.sh
3

To know something about scheduling policy and niceness, which are very different things:
man 2 sched_setscheduler (at least for a Linux system).

Then:

man chrt
man nice

Then keep in mind that with regard to I/O you should use the ionice command:
man ionice
--
Bye

4

is it ok if i use ionice in such a way, please confirm.


ionice -c3 -p pid
5

Sure. Of course run ionice with the right user. If du is run as root, use root for ionice too.
You know how to find the PID of your running du, don't you? With top, for instance.
--
Bye

6

Thanks, but normal use ionice not allowed is there some restrictions..........

7

Stick with using nice. No need to use ionice.