mysql - syntax error near unexpected token `done' in bash code -


i looking working shell code auto restart mysql servers if not working. here code witch foound in google search, listen 3306 port, if not working, restart. if can not restart, reboot server.

can code work? if not, can share me working code? if yes, met syntax error near unexpected tokendone' in bash code`, how solve it? thanks.

port=`netstat -na|grep "listen"|grep "3306"|awk -f[:" "]+ '{print $5}'` mysqlip=`ifconfig eth0|awk '/inet/{print $2}'|cut -c 6-` while [ `whoami` == "root" ]   if [ "$port" == "3306" ];then     echo "mysql running......"   else     service mysql restart        if [ "$port" == "3306" ];then        else            reboot        fi   fi break done

modify code:

port=`netstat -na|grep "listen"|grep "3306"|awk -f[:" "]+ '{print $5}'` mysqlip=`ifconfig eth0|awk '/inet/{print $2}'|cut -c 6-` while [ `whoami` == "root" ]   if [ "$port" == "3306" ];then     echo "mysql running......"   else     service mysql restart        if [ "$port" == "3306" ];then          :        else            reboot        fi   fi break done

your condition test must execute sort of code if true.

it looks want reboot if "$port" not "3306".

you should use break when testing condition, otherwise loop execute once.

the port variable not update unless call code sets again after need update.

also, don't need use grep when using awk.

#!/bin/bash  callport () {     port=`netstat -na|awk -f[:" "]+ '/listen/ && /3306/ {print $5}'` } mysqlip=`ifconfig eth0|awk '/inet/{print $2}'|cut -c 6-` while [ `whoami` == "root" ]   callport   if [ "$port" == "3306" ];then     echo "mysql running......"     break   else     service mysql restart     callport        if [ "$port" != "3306" ];then            reboot        fi   fi done

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