Hi,
works in ksh:
date -d @$(($(date '+%s')-3600)) '+%Y%m%d %H:%M'
wmp
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I need a one-line UNIX shel command to add or subtract seconds or hours from a date.
I need a one-line command to add or subtract seconds or hours from a date. I have the pieces but I can't put them together in a one-line command. I have to build this command on the fly in my EDI mapper so I can't write and execute a regular multi-line script from a .sh file. It all has to fit on one line and called in one shot.
Current time = 20081119 14:22
date +%s
1227122553
And then I can calculate a time 1 hour ago
expr 1227122553 - 3600
1227118953
and them put it back together as a date in proper format
date -d @1227118953 '+%Y%m%d %H:%M'
20081119 13:22
Now how do I string this into a one-line command to get the date, add/subtract x amount of seconds and then convert back to date format (ie: 20081119 12:21:14)?
Something like this but this does't work - "date -d @ {expr date+%s - 3600} '+%Y%m%d %H:%M''"
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by: TintinPosted on 2008-11-19 at 12:22:44ID: 22998097
If you simply want the time 1 hour ago, you can do
date --date '1 hour ago' +'%Y%m%d %H:%M'