TimeStamp Comparison in Linux

Comparing Date, Time or TimeStamp is tricky thing in Linux. This is how you can achieve this -


By converting date to Seconds
$ date +%s
the above command will current time in seconds since 1970-01-01 00:00:00 UTC

if you have time in string form you can use below command to convert them like -
$ date -d "$ts" +%s                #where ts is containing the date or timestamp
i.e -

	ts1="2008-02-13 10:48:58.502075"
	date -d "$ts1" +%s
	1202928538
	# so for comparison of timestamps --
	ts1="2008-02-13 10:48:58.502075"
	ts2="2008-12-15 16:00:00.000000"
	if [ $( date -d "$ts1" +%s ) -gt $( date -d "$ts2" +%s ) ]; then echo $ts1; else echo $ts2; fi
	2008-12-15 16:00:00.000000

view raw TScomparision.sh hosted with ❤ by GitHub

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