帮我改一下监视mysql的脚本
#!/bin/sh#
# Monitor the mysql db
echo "**************************************************"
echo "**"
shutdown="./bin/mysqladmin -u root shutdown"
startup="./bin/safe_mysqld"
num=`ps -ef | grep mysql | wc |awk '{print $1}'`
echo "there are $num mysql process!"
### restart mysql if process less than 3
if [ $num -lt 3 ]
then
echo "********begin restart mysql!***************"
cd ~/mysql
pwd
#$shutdown
#sleep 10
$startup
fi
echo "**"
echo "**************************************************"
因为safe_mysqld需要在mysql目录下起董，但.却是调用的路径，谁能帮我改一下？ 改成mysql目录应该就可以
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