Shell scripts which sends email alert if CPU/Disk Space usage continuously goes above a certain amount.
monitor_cpu.sh - monitor cpu usage
These script is a kind of System Activity Reporter [SAR] on Linux.
Using these script user gets email alert on cpu overload and get detailed information for overloaded processes
Calculation is based on the very top loaded process load value
monitor_disk_space.sh - monitor disk space usage
Using these script user gets email alert on disk space usage overload and report file system disk space usage.
Put the script file in an appropriate folder and run the installation command. Then it will be created a cronjob for that file, which will monitor the server load.
Required one of the following to have on the server: python OR bc OR php
It is used for calculation floating point values // Where to send the warning mail
OPTION_ALERT_EMAIL="your@personal.email"
// If the high CPU load exceeds this value, then will be sent an email alert
OPTION_ALERT_ON_CPU_LOAD_IF_EXCEEDS=75 #decimal
// How many times check the top loaded process
OPTION_CHECK_n_TIMES=5 #integer
// Delay between checks
OPTION_CHECK_DELAY=6 #decimal
// Arbitrary precision calculator
OPTION_CALC_DECIMALS_VIA="python" #possible values: {python,php,bc}
// Crontab schedule
OPTION_CRONTAB_SCHEDULE="*/5 * * * *"// will be created a cron job for this file
monitor_cpu.sh install
// will be created a cron job for this file
monitor_disk_space.sh install// will be removed the cron job created after installation
monitor_cpu.sh uninstall
// will be removed the cron job created after installation
monitor_disk_space.sh uninstallUSER PID %CPU %MEM TIME COMMAND
apache 9298 12.8 0.1 0:01 /usr/sbin/httpd+
apache 9460 9.7 0.1 0:00 /usr/sbin/httpd+
mysql 18667 5.6 0.4 1841:19 mysqld
apache 9288 9.3 0.1 0:04 /usr/sbin/httpd+Filesystem Size Used Avail Use% Mounted on
/dev/md5 16G 3.0G 12G 21% /usr+
/dev/md1 488M 104M 359M 23% /boot+