Shell Programming and Scripting

Hey,

I have a file which starts each line with 6 digits followed bya colon:

090607:The rest of the line
091207:Also some text
091207:Here's some more text

And I want to reformat them into:

06-09-07:The rest of the line
12-09-07:Also some text
12-09-07:Here's some more text

I already split the file into three temporaty files with cut, but how do I join them?

Or is there another way to do this?

Thanx.

Assuming there is no digit(s) in the second part (after , here is one solution from my side.

jsaikia@LOLA:~/prac$ cat fil2
090607:The rest of the line
091207:Also some text
091207:Here's some more text

jsaikia@LOLA:~/prac$ cat fil2 | sed 's/[0-9][0-9]/&-/g' | sed 's/-:/:/'
09-06-07:The rest of the line
09-12-07:Also some text
09-12-07:Here's some more text

Since all lines start with 6 digits

Code:

sed -e "s/^\(..\)\(..\)\(.*\)/\2-\1-\3/g" in.txt

Yeah, Thanks.
That does exactly what I want.