我想要一个 cron 作业来设置某些服务的优先级，但是，父级以 root 身份运行，其余的以另一个用户身份运行。但是，父进程将使用其优先级 ID 重新生成进程，因此 cron 作业必须运行得比它应该运行的多。有没有办法设置优先级？
我想设置更高的示例：
1 S root 13826 1 0 81 0 - 3289 rt_sig 00:33 ? 00:00:00 nginx: master process /usr/local/sbin/nginx -c /etc/nginx/nginx.conf
5 S root 15474 1 0 75 0 - 3848 - Apr22 ? 00:01:37 /usr/local/apache/bin/httpd -k start -DSSL
5 S nobody 19511 13826 0 75 0 - 3297 - 13:06 ? 00:00:10 nginx: worker process
5 S nobody 19512 13826 0 78 0 - 3361 - 13:06 ? 00:00:11 nginx: worker process
5 S nobody 19513 13826 0 75 0 - 3681 - 13:06 ? 00:00:09 nginx: worker process
5 S nobody 19514 13826 0 78 0 - 3297 - 13:06 ? 00:00:07 nginx: worker process
5 S root 19521 15474 0 77 0 - 3561 - 13:06 ? 00:00:00 /usr/local/apache/bin/httpd -k start -DSSL
5 S nobody 19522 15474 0 78 0 - 3848 431083 13:06 ? 00:00:00 /usr/local/apache/bin/httpd -k start -DSSL
5 S nobody 19523 15474 0 75 0 - 3952 semtim 13:06 ? 00:00:00 /usr/local/apache/bin/httpd -k start -DSSL
5 S nobody 19524 15474 0 75 0 - 3951 semtim 13:06 ? 00:00:00 /usr/local/apache/bin/httpd -k start -DSSL
5 S nobody 19525 15474 0 75 0 - 3949 semtim 13:06 ? 00:00:00 /usr/local/apache/bin/httpd -k start -DSSL
5 S nobody 19526 15474 0 78 0 - 3947 - 13:06 ? 00:00:00 /usr/local/apache/bin/httpd -k start -DSSL
5 S nobody 19527 15474 0 78 0 - 3949 semtim 13:06 ? 00:00:00 /usr/local/apache/bin/httpd -k start -DSSL
我知道有http://www.rfxn.com/projects/system-priority/但据我所知，只有 UID 才能做到。