TIMESTAMP
A timestamp is a sequence of characters or encoded information identifying when a certain event occurred, usually giving date and time of day, sometimes accurate to a small fraction of a second.
A timestamp is the current time of an event that is recorded by a computer. Through mechanisms such as the Network Time Protocol ( NTP ), a computer maintains accurate current time, calibrated to minute fractions of a second. Such precision makes it possible for networked computers and applications to communicate effectively.
How to Get timestamp in UNIX
Command : – date +%s
Result : – 1405407447
How to convert timestamp into Date – time in UNIX
Command : – date -d @1405407447 +’%Y-%m-%d %H:%M:%S’
Result : – 2014-07-15 01:57:27
How to set system Date Time in UNIX
Command : – date -s “11/20/2003 12:48:00”
Set the system date and time to November 20, 2003, 12:48 PM
How to get GMT time Information in UNIX
GMT time according to selected country..
Command : – TZ=’America/Los_Angeles’ date
Result : – Tue Jul 15 00:28:10 PDT 2014
Command : – TZ=’India’ date
Result : – Tue Jul 15 07:32:40 India 2014
How to convert Date into Unix timestamp
To convert Date time in to specific Timestamp
Method: 1
Command : – date -d “2010-10-02 17:56:56” “+%s”
Result : – 1286060216
Method: 2
Command : – date –date=’06/12/2012 07:21:22′ +”%s”
Result : – 1339503682
How to add and subtract Date
To add some days in specific Date
Command : – date -d ‘Jan 1 1982 + 11 days’
Result : – Tue Jan 12 00:00:00 EST 1982
To add some Days and get the output in timestamp
Command : – date -d ‘Jan 1 1982 + 11 days’ +%s
Result : – 379659600
To subtract some days in specific Date
Command : – date -d ‘Jan 1 1982 – 1 days’
Result : – Thu Dec 31 00:00:00 EST 1981
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