• CentOS 6.x or RedHat like

• yum install mailx

• postfix or other MTA running

wget https://raw.githubusercontent.com/surfingtux/chkservices/master/download/chkservices.tgz

tar xvf chkservices.tgz

cd chkservices

./install.sh

vim /etc/chkservices/chkservices.conf

chkconfig chkservices on

service chkservices start/stop

For CentOS 7.x and newer, use systemd configuration: https://wiki.archlinux.org/index.php/Systemd