You can display time and date described by format (also known as relative date format) under GNU/date utility which is part of Linux and UNIX like operating systems. The default format is to display current date and time. To display tomorrows date, enter:
$ date
$ date --date="-1 days ago"
Sample outputs:
Wed Apr 27 02:29:59 IST 2011You can use bash for loop as follows:
Thu Apr 28 02:29:34 IST 2011
Sample outputs:
#!/bin/bash
for i in {1..10}
do
date --date="-$i days ago"
done
Thu Apr 28 02:33:02 IST 2011
Fri Apr 29 02:33:02 IST 2011
Sat Apr 30 02:33:02 IST 2011
Sun May 1 02:33:02 IST 2011
Mon May 2 02:33:02 IST 2011
Tue May 3 02:33:02 IST 2011
Wed May 4 02:33:02 IST 2011
Thu May 5 02:33:02 IST 2011
Fri May 6 02:33:02 IST 2011
Sat May 7 02:33:02 IST 2011
Change Date Format To DD/MM/YY
Use the following syntax:$ date +"%d/%m/%y" --date="-5 days ago"
Here is update code:
#!/bin/bashSample outputs:
# Increment the date in dd/mm/yy format
for i in {1..10}
do
date +"%d/%m/%y" --date="-$i days ago"
done
28/04/11You can use the same technique in backup scripts to adjust date and time.
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