how to remove 0 (zero) from the day and month but not from the year (01/09/2012) using in Linux (Redhat)

Question

Using Linux (Redhat)

When I use dialog: --calendar to output the date. The format will be dd/mm/yyyy but I need the format to be d/m/yyyy for day and month numbers smaller than 10.

Example
Output: 01/09/2012
Result: 1/9/2012

Any suggestions are appreciated.

Answer 1

You can use sed. Here it removes all leading 0's appearing at the beginning of every "word": \<.

$ echo 01/09/2012 | sed 's/\<0//g'
1/9/2012

You might also used \b which match any word boundary:

$ echo 01/09/2012 | sed 's/\b0//g'
1/9/2012