shell练习1

写一个脚本：要求如下：
1：依次向/etc/passwd目录中的每一个用户问好，并指出其UID号！（eg：Hello root，your uid is 0）
2：统计这个脚本共有多少个账户？

#!/bin/bash

name=`cat /etc/passwd |awk -F: ‘{print $1}‘`

for u in $name

do

i=`id $u |awk -F‘=‘ ‘{print $2}‘ |awk -F‘(‘ ‘{print $1}‘`

uid_num=`grep $u:x /etc/passwd |awk -F: ‘{print $3}‘`

if [ $i == $uid_num ]

then

echo "Hello $u, your uid is $i !"

else

echo "Wrong!!!"

fi

done

y=`cat /etc/passwd |wc -l`

echo "There are $y users.