How to force time sync Find out your ntpd servers: grep server /etc/ntp.conf service ntpd stop ntpdate -s service ntpd start
Many times you will need to conver Unix/Linux epoch time to a readable date format That is quite simple
Nagios plugin to verify a FTP site, by uploading a file and testing the time it takes. check_ftp.php #!/usr/bin/php
I think it is important to know how much time it is taking for the varnish to go to the backend (webserver) and return.