On 07/04/15 01:27, Jatin Davey wrote: <> > In case of power failure on this server , how can i make the system to > shutdown gracefully so that it unmounts the file-system and cleans up > the required buffers. > > My server does have a battery backup so it will help in shutting down > the system more gracefully. use what is already packaged for centos: apcupsd - apc ups http://www.apcupsd.com or nut - network ups tools http://www.networkupstools.org/ apcupsd is designed to run with apc brand ups. nut is designed to run with apc and other brands. both monitor ups and will shut system down via shutdown command. i use apcupsd on my system with an apc back-ups rs 800 and have never had problems. during a 5 day power outage, i had change config so i could run system when i used a gas powered generator to supply mains and voltage would drop to a low of around 90 v. hth. -- peace out. -+- If Bill Gates got a dime for every time Windows crashes... ...oh, wait. He does. THAT explains it! -+- in a world with out fences, who needs gates. -+- CentOS GNU/Linux 6.6 tc,hago. g .