HDD Health Check Alert

Physical Disk with Smartctl
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for i in `lshw -class disk -class tape | grep "logical name" | cut -d: -f2`; do echo Disk $i ; echo "=========================================" ;smartctl --all $i | grep 'Status\|Drive' ; echo " "; done > /tmp/output.txt
mail -s "HDD Health Check Alert: `hostname`" user@domain.com  < /tmp/output.txt
rm -f /tmp/output.txt

With MegaRaid Controller

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for i in `/opt/MegaRAID/MegaCli/MegaCli64 -PDlist -a0|grep Device.Id | awk '{print $3}'` ; do echo Device $i ; smartctl -a -d sat+megaraid,$i /dev/sda|grep 'PASSED\|Reallocated_Sector_Ct\|Temperature_Celsius'; echo " "; done > /tmp/output.txt

mail -s "HDD Health Check Alert: `hostname`" user@domain.com < /tmp/output.txt

rm -f /tmp/output.txt

Commandline fix for the Wordpress DB Connection error

Run the below command from your wordpress installation folder.

for i in `find -iname wp-config.php` ; do j=$(grep 'DB_NAME' $i | awk -F "'" '{print $4}') ; k=$(grep 'DB_USER' $i | awk -F "'" '{print $4}') ;l=$(grep 'DB_PASSWORD' $i | awk -F "'" '{print $4}') ; echo GRANT ALL PRIVILEGES ON $j.* TO $k@"localhost" identified by "'$l'"";" ; done

Script to block IP address which has more connection to the port 80

###This will block the IP which has more than 50 connection to the port 80#####
netstat -anpl | awk '{print $5}'| grep :80 | grep -v [a-z] | cut -d : -f1 | sort -n | uniq -c | sort -n | tail -5 | awk '($1>50){print $2}' > /tmp/iplist.txt
ip_address="<server_IP>"
for i in `cat /tmp/iplist.txt`; do
if [ $i != $ip_address ]
then
iptables -A INPUT -s $i -j DROP
iptables -A FORWARD -s $i -j DROP
netstat -anp | grep $i | awk '{print $7}' | cut -d \/ -f1 | grep -oE "[[:digit:]]{1,}" | xargs kill
fi
done
service iptables save;
rm -f /tmp/iplist.txt