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Shell logic case
2022-07-03 09:36:00 【chenhyc】
Case study 1：ping Pass back www.baidu.com is up,ping No return www.baidu.com is down
Code ：ping -c1 www.baidu.com && echo “www.baidu.com is up” || “www.baidu.com is down”
remarks , If not shown ping The process , You can change to ：ping -c1 www.baidu.com &> /dev/null
Case study 2：
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