while示例_shell脚本

工作环境：Red Hat Enterprise Linux Server release 6.5 (Santiago) 、 bash

#!/bin/bash
#
awk -F: '{print $1,$3,$7}' /etc/passwd >>passwd.txt
while read name id shell
do
    echo "user name:$name"
    echo "user uid :$id"
    echo "user shell:$shell"
    echo
done < passwd.txt

注意：passwd.txt文件的列数一定要大于变量的个数，否则，会报错