Let's take the following example text:
some:
- 1test@test.nl\\
- test@test.nlk
- test@test.nl
- test@test.nl test
- some@test.nl
list:
- 1test@test.nl
- test@test.nlk
- test@test.nl
- test@test.nl test
- some@test.nl
I only want to match a specific email that comes before list:
e.g. we want to see if test@test.nl is in the first list (some:). I made the following regex:
(- test@test.nl\s*\n).*list:
which seems to do exactly what we want when trying online.
However, when I try to use it with grep, it does not work.
I tried with -e, -P and -E.
The errors I get: invalid option -- ' ' or no match at all.
How can one use the given regex with grep?
note: we are on a stripped down linux version, we are only allowed to use commands that are in standard linux
You can also grep everything before 'list:' and pipe to grep for email:
grep -B 1000000 "list:" example.txt | grep -P "test@test.nl\s*$"