mysql 用户免密执行root命令方法

说明：sudo命令的执行流程是: 当前用户转换到root, 然后以root身份执行命令, 执行完成后, 直接退回到当前用户.需要注意的是: 执行sudo时输入的密码, 是当前用户的密码, 并非root密码1、修改文件写权限# ls -l /etc/sudoers-r--r----- 1 root root 4042 Nov  4 15:05 /etc/sudoers# chmod u+x /etc/sudoers# vi /etc/sudoers# ls -l /etc/sudoers2、添加免密用户vi  /etc/sudoers## Allow root to run any commands anywhereroot    ALL=(ALL)       ALL## add mysql user mysql   ALL=(ALL)     NOPASSWD: ALL3、sudo免密测试[mysql@devdb01 ~]$ sudo ip addr1: lo:  mtu 65536 qdisc noqueue state UNKNOWN     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00    inet 127.0.0.1/8 scope host lo    inet6 ::1/128 scope host        valid_lft forever preferred_lft forever2: eth0:  mtu 1500 qdisc pfifo_fast state UP qlen 1000    link/ether 00:50:56:87:3b:bd brd ff:ff:ff:ff:ff:ff    inet 1x2.55.3.xx/24 brd 196.55.3.255 scope global eth0    inet6 fe80::250:56ff:fe87:3bbd/64 scope link        valid_lft forever preferred_lft forever[mysql@devdb01 ~]$