Network Engineers and IT sysadmins regularly need to write scripts in unix based environment. The outcome of such scripts are also required to be emailed sometimes. One very handy email client which can be used for such a situation is sendEmail.
SysAdmin
Mind Map: Setup of Linux based L4 Load Balancing LVS + keepalived HA
Disclaimer: Some steps may be missing or different as per varying requirements. I have deployed this in production using the above steps.
networkfuel 