This article we are introducing a shell script to perform linux system health check. This script collects system information and status like cpu / memory / disk usage.

CentosSystemHealth.sh

#!/bin/bash
MAİL="mail@mail.com"


# Memory


free -m | awk 'NR==2{printf $3}' > /tmp/memory
if [[ $(free -m | awk 'NR==2{printf $3}') -gt 3600 ]];

then
  /bin/mail -s "Memory Usage" $MAİL < /tmp/memory

else

exit
fi


#Disk
df  | awk 'NR==2{printf $4 }' > /tmp/disk

if [[ $(df  | awk 'NR==2{printf $4 }') -lt 10000  ]];

then
    /bin/mail -s "Disk Usage" $MAİL < /tmp/disk

else
exit


fi
#CPU 

mpstat 1 1  | awk 'NR==4{printf int($4) }' > /tmp/cpu

if [[ $(mpstat 1 1  | awk 'NR==4{printf int($4) }' ) -gt 50 ]];

then
sleep 60

if [[ $(mpstat 1 1  | awk 'NR==4{printf int($4) }' ) -gt 50 ]];

then

    /bin/mail -s "CPU Usage" $MAİL < /tmp/cpu



else
exit

fi



else
echo " CPU " > /tmp/echo

fi