johnniexo88 johnniexo88 - 1 month ago 8
Linux Question

How do I run this bash script in ubuntu?

The script is from here:

https://bash.cyberciti.biz/monitoring/monitor-mysql-server-shell-script/

here is the code:

#!/bin/bash
# Shell script to restart MySQL server if it is killed or not working
# due to ANY causes.
# When script detects mysql is not running (it basically sends ping request
# to MySQL) it try to start using /etc/init.d/mysql script; and it sends an
# email to user indicating the status.
# This script must be run from Cron Job so that it can monitor mysql server.
# For more info visit following url:
# http://www.cyberciti.biz/nixcraft/vivek/blogger/2005/08/linux-mysql-server-monitoring.html
# --------------------------------------------------------------------------
# Copyright (C) 2005 nixCraft project <http://cyberciti.biz/fb/>
# This script is licensed under GNU GPL version 2.0 or above
# -------------------------------------------------------------------------
# This script is part of nixCraft shell script collection (NSSC)
# Visit http://bash.cyberciti.biz/ for more information.
# -------------------------------------------------------------------------

# mysql root/admin username
MUSER="root"
# mysql admin/root password
MPASS="SET-ROOT-PASSWORD"
# mysql server hostname
MHOST="localhost"
#Shell script to start MySQL server i.e. path to MySQL daemon start/stop script.
# Debain uses following script, need to setup this according to your UNIX/Linux/BSD OS.
MSTART="/etc/init.d/mysql start"
# Email ID to send notification
EMAILID="notification@somewhere-corp.com"
# path to mail program
MAILCMD="$(which mail)"
# path mysqladmin
MADMIN="$(which mysqladmin)"

#### DO NOT CHANGE anything BELOW ####
MAILMESSAGE="/tmp/mysql.fail.$$"

# see if MySQL server is alive or not
# 2&1 could be better but i would like to keep it simple and easy to
# understand stuff :)
$MADMIN -h $MHOST -u $MUSER -p${MPASS} ping 2>/dev/null 1>/dev/null
if [ $? -ne 0 ]; then
echo "" >$MAILMESSAGE
echo "Error: MySQL Server is not running/responding ping request">>$MAILMESSAGE
echo "Hostname: $(hostname)" >>$MAILMESSAGE
echo "Date & Time: $(date)" >>$MAILMESSAGE
# try to start mysql
$MSTART>/dev/null
# see if it is started or not
o=$(ps cax | grep -c ' mysqld$')
if [ $o -eq 1 ]; then
sMess="MySQL Server MySQL server successfully restarted"
else
sMess="MySQL server FAILED to restart"
fi
# Email status too
echo "Current Status: $sMess" >>$MAILMESSAGE
echo "" >>$MAILMESSAGE
echo "*** This email generated by $(basename $0) shell script ***" >>$MAILMESSAGE
echo "*** Please don't reply this email, this is just notification email ***" >>$MAILMESSAGE
# send email
$MAILCMD -s "MySQL server" $EMAILID < $MAILMESSAGE
else # MySQL is running :) and do nothing
:
fi
# remove file
rm -f $MAILMESSAGE


this script will restart mysql every time it crashes or shuts off. i put the script in /path/to/script/mysql-restart.sh

so how do i run it? thanks.

Answer

It goes in your cron.

* * * * * /path/to/script/mysql-restart.sh

More info on cron here:

http://askubuntu.com/questions/2368/how-do-i-set-up-a-cron-job

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