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I have a file that contains lines of the type -

find /home/subd1/subd2/$dirname -type d 
find /home1/subd1/subd2/$dirname -type d 
find /home10/subd1/subd2/$dirname -type d

I want to find /home/ or /home<no>/ and replace it with DIFFERENT /home/ or /home<no>/. Basically, find and replace -

/home with /home2 or
/home2 with /home3 or
/home3 with /home
etc.

I tried doing -

sed -i 's/\/home.?\//\/home3\//g' /path/to/file
sed -i 's/\/home[\d]?\//\/home3\//g' /path/to/file

But this made no change to the file. Am i missing something here? Thanks

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\d is not supported by sed. Try using [0-9] instead.

As an example I tried the sample file you provided

find /home/subd1/subd2/$dirname -type d 
find /home1/subd1/subd2/$dirname -type d 
find /home10/subd1/subd2/$dirname -type d

When given sed -i 's;/home[0-9]*/;/home3/;g' test.txt (Using ; as the sed delimiter so that I don't have to escape every /) the file was edited to

find /home3/subd1/subd2/$dirname -type d 
find /home3/subd1/subd2/$dirname -type d 
find /home3/subd1/subd2/$dirname -type d

It's important to note that this will change every instance of /home/ and /home<no>/ to be the same new values (in this case /home3/). I think that this is your objective, but if it's not you will need a different sed expression

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