1. su到root用户,并进入/etc目录
[roy@localhost etc]$ su - Password: [root@localhost ~]# [root@localhost ~]# cd /etc/ [root@localhost etc]# ll sudo* -rw-r-----. 1 root root 1786 May 30 10:18 sudo.conf -r--r-----. 1 root root 3907 May 30 10:18 sudoers -rw-r-----. 1 root root 3181 May 30 10:18 sudo-ldap.conf
2.添加sudoers文件的写权限
[root@localhost etc]# chmod u+w sudoers [root@localhost etc]# ll sudoers -rw-r-----. 1 root root 3907 May 30 10:18 sudoers
3.修改sudoers文件
[root@localhost etc]# vim sudoers
4.将sudoers文件的写权限去掉,并退出root用户
[root@localhost etc]# chmod u-w sudoers [root@localhost etc]# ll sudoers -r--r-----. 1 root root 3907 May 30 10:18 sudoers [root@localhost etc]# exit exit [roy@localhost etc]$
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