关闭所有：

for zdw in  `chkconfig --list|grep "5:on"|awk ‘ {print $2}‘ `;do chkconfig $zdw off;done

for zdw in  `chkconfig --list|grep "5:on"|awk ‘ {print $1}‘ `;do chkconfig $zdw off;done

for zdw in  `chkconfig --list|grep "4:on"|awk ‘ {print $1}‘ `;do chkconfig $zdw off;done

for zdw in  `chkconfig --list|grep "2:on"|awk ‘ {print $1}‘ `;do chkconfig $zdw off;done

开启需要的：

for zdw in crond network sshd rsyslog;do chkconfig $zdw on;done

for zdw in crond network sshd rsyslog;do chkconfig $zdw on;done

centos 系统优化