提示用户输入一个用户名，输入要sudo执行的命令，如果执行该shell的不是以root的身份在执行的话则退出脚本，然后输入用户能够sudo的命令名称，加入信号捕捉。
如下：
#!/bin/bash
# Description:
# Date && Time:2010-12-26 07:39:12
# Author:AIDA_ZYF
# Version:2.6.18-164.el5
trap `echo "QUIT...";exit 1` SIGINT
if [ ! $USER='root' ];then
echo "Only root can execute this scripts."
exit 1
else
echo "Please input a name."
read NAME
if grep "^$NAME" /etc/passwd &>/dev/null ;then
read -p "Please give $NAME a run command" COM
echo "$NAME ALL=(ALL) NOPASSWD:/sbin/$COM" >>/etc/sudoers
else
echo "Please input a right name."
fi
fi
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