Limit CPU usage for a user in Ubuntu

Question

I want to limit the percentage of CPU a user who ssh to my comp can use like say only 25% cpu usage at max. How do i do this in ubuntu ?

Answer 1

I think you can't do that. What you can do is modifying priority for user. You can do that by editing file /etc/security/limits.conf:

john hard priority 20

Sets priority for john's processes to 20 (effective after next login). 20 is lowest priority.

This way john can use 100% of CPU, but if someone else needs it, other user will immediately get it, and john's tasks will wait (or actually slow down, not stop completely).