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Well...I am pretty new at this topic but I would like to learn it from example.
The first thing I am working on is to modify the command date to be shown as DD/MM/YY only using regular expression but I dont know how to combine what there is in the regexp tutorials online and the syntax for batch scripting. Any help?
Here is what I what.
run a file test: ~# ./test
Where file test is:
DATE=$( date )
#Here i want to echo the date but in format DD/MM/YY using regular expressions.
THANKS IN ADVANCE. Also if you can point me to good regexp tutorials (directed towards batch scripting), that will be great.
Bash itself doesn't really have a full regex feature anyway. It has a basic level of functionality that's mostly there for pattern matching in tests and file globbing. It's not really designed to do direct string reformatting like the above. There are no \1, \2, etc. storage buffers, for example.
You could probably use it to extract each portion of your input date string into separate variables, which you could then use to build the desired output string. But for real regex operations you really need to use sed or awk.