如何知道远程的机器是否宕机
#!/bin/bash mail=2422606568@qq.com while true do ping -c 2 >/dev/null 2>&1 if [ $? -ne 0 ];then echo " |mail-s "ping baidu is down" $mail else echo "baidu is ok" fi; sleep 30 done
网页题目：如何知道远程的机器是否宕机
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