#!/bin/bash  cmd='mysql -uslave -ppasswd -P3306 -h 192.168.0.72 -Be'  status=`$cmd 'show slave status\G'`  Seconds_Behind_Master=`echo "$status"|awk '/Seconds_Behind_Master/{FS=":";print $2}'`  Read_Master_Log_Pos=`echo "$status"|awk '/Read_Master_Log_Pos/{FS=":";print $2}'`  Exec_Master_Log_Pos=`echo "$status"|awk '/Exec_Master_Log_Pos/{FS=":";print $2}'`  Last_IO_Errno=`echo "$status"|awk '/Last_IO_Errno/{FS=":";print $2}'`  Last_SQL_Errno=`echo "$status"|awk '/Last_SQL_Errno/{FS=":";print $2}'`  Slave_IO_Running=`echo "$status"|awk '/Slave_IO_Running/{FS=":";print $2}'`  Slave_SQL_Running=`echo "$status"|awk '/Slave_SQL_Running/{FS=":";print $2}'`     #nagios status:  STATE_OK=0  STATE_WARNING=1  STATE_CRITICAL=2  STATE_UNKNOWN=3  STATE_DEPENDENT=4     if [ "$Slave_IO_Running" != "Yes" -o "$Slave_SQL_Running" != "Yes" ];then          echo "Slave_IO or Slave_SQL process exited! Last_IO_Errno:$Last_IO_Errno Last_SQL_Errno:$Last_SQL_Errno"          exit $STATE_CRITICAL  fi     later=$[$Read_Master_Log_Pos - $Exec_Master_Log_Pos]     if [ $later -ge 100 ];then          echo "Read_Master_Log_Pos:$Read_Master_Log_Pos Exec_Master_Log_Pos:$Exec_Master_Log_Pos"          exit $STATE_WARNING  fi     if [ $Seconds_Behind_Master -ge 30 ];then          echo "Warning: Seconds_Behind_Master:$Seconds_Behind_Master"          exit $STATE_WARNING  fi  echo "Slave OK-Read_Master_Log_Pos:$Read_Master_Log_Pos Exec_Master_Log_Pos:$Exec_Master_Log_Pos Seconds_Behind_Master:$Seconds_Behind_Master"  exit $STATE_OK