摘要：
˃˃Tijun博客的原创http://www.cnblogs.com/tijun/˂˂步骤1：以root身份查看/etc/sudoers[root@ltt2hadoop]#Ls-l/etc/sudoers-r----r-----。1 rootroot4033Sep2601:24/etc/sudoers找到了只读文件，并将其更改为可写状态[root@ltt2hadoop]#chmod777/etc/sudoe
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第一步，以root用户查看/etc/sudoers
[root@ltt2 hadoop]# ls -l /etc/sudoers -r--r-----. 1 root root 4033 Sep 26 01:24 /etc/sudoers
发现这个文件只读文件，将其更改成可写状态
[root@ltt2 hadoop]# chmod 777 /etc/sudoers [root@ltt2 hadoop]# ls -l /etc/sudoers -rwxrwxrwx. 1 root root 4033 Sep 26 01:24 /etc/sudoers
第二步，添加内容到文件内
[root@ltt2 hadoop]# vi /etc/sudoers .. .. ## Allow root to run any commands anywhere root ALL=(ALL) ALL hadoop ALL=(ALL) ALL .. ..
再将文件改为只读
[root@ltt2 bin]# chmod 440 /etc/sudoers [root@ltt2 bin]# ls -l /etc/sudoers -r--r-----. 1 root root 4022 Sep 26 01:47 /etc/sudoers
切换普通用户，就可以用sudo命令了
[root@ltt2 bin]# su hadoop [hadoop@ltt2 bin]$ sudo shutdown -h now We trust you have received the usual lecture from the local System Administrator. It usually boils down to these three things: #1) Respect the privacy of others. #2) Think before you type. #3) With great power comes great responsibility. [sudo] password for hadoop: Broadcast message from hadoop@ltt2.bg.cn (/dev/pts/0) at 1:55 ... The system is going down for halt NOW!
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