nice设置进程优先级

优先级从-20 - 19,数字越大优先级越低.

$ nice –n 5~/bin/longtask            //把优先级降低(提高谦让度)5

$ sudo renice -58829                //把谦让值设为-5

$ sudo renice 5 –uboggs             //把boggs的进程的谦让值设为5