Shell脚本编程01
来自b站学习课程
https://www.bilibili.com/video/BV19t411s7Jx?p=3
P3 小节
[ script]# ping -c1 www.baidu.com &>/dev/null && echo "baidu is up" || echo "baidu is down！" baidu is up
&>
包含正确输出和错误输出
&&
前面命令执行成功会返回一个参数$？，值为0，执行不成功值为非0
来自b站学习课程
https://www.bilibili.com/video/BV19t411s7Jx?p=3
P3 小节
[ script]# ping -c1 www.baidu.com &>/dev/null && echo "baidu is up" || echo "baidu is down！" baidu is up
&>
包含正确输出和错误输出
&&
前面命令执行成功会返回一个参数$？，值为0，执行不成功值为非0