Question

16

rated 0 times [ 16] [ 0] / answers: 1 / hits: 77323 / 2 Years ago, mon, november 21, 2022, 3:53:39

How do I get from this:

randomcollege-ntuser90

to this:

user90

using sed?

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Member since Fri, Jun 3, 2022

2 Years ago

answered 2 Years ago alliulet · Accepted Answer

I'd use a simple grep to look for user90:

$ echo "randomcollege-ntuser90" | grep -o user90

user90

If user90 is not constant, prefer this command:

$ echo "randomcollege-ntuser90" | grep -oP '(?<=randomcollege-nt)w+'

user90

Finally using sed to edit the file in place:

$ sed -ri 's/randomcollege-nt(user[0-9]+)/1/' my_file

Or to match all possible user accounts:

$ sed -ri 's/randomcollege-nt(w+)/1/' my_file