mysql主从状态检测：
echo "show slave status\G;"|mysql -uroot -pyanghui|grep Running|awk -F: ‘{print $2}‘|wc -c
MySQL运行状态检测:
echo "show processlist\G;"|mysql -uroot -pyanghui|grep -i host:|grep [0-9]|sed ‘s/Host://g‘
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原文：http://461205160.blog.51cto.com/274918/1754652