I need a way to slice everything after an email appears and before certain text appears.
Example formats are shown here:
[email protected]:0:3rw3e:weofkew:StackOverflow=
[email protected]:19.2132.1:StackOverflow=
Format needed would be:
[email protected]:StackOverflow= (followded by everything else on the line).
So essentially slicing after an email appears, and before StackOverflow= appears.
Notes: All emails are unique, it's not literally [email protected]
sed -r 's/(@[^:]+:).*(StackOverflow=)/\1\2/' input.txt
sed -r 's/foo/bar/' input.txt: use sed with extended regular expressions, replacing pattern foo with bar, for file input.txt.(@[^:]+:).*(StackOverflow=): match from the @ in the email address, which is followed by 1 or more non-: characters ([^:]+). This is then followed by a :. Capture this all in the first capturing groups with (). This is followed by a number of characters .*, then StackOverflow=, which we also capture in a group ()./1/2: replace this expression with the partial email address (the first capturing group above), skip the part in between, then followed by the second capturing group.N.B. this makes a lot of assumptions about the format of the input file, e.g. the format of the email address, the number of @ and StackOverflow= per line, etc.