[SOLVED] How to grep with regex lookahead

Issue

I can't see what I'm missing in my grep command, can you?

http://regexr.com/5shri

echo "2021-05-09 15:38:56.888 T:1899877296 NOTICE: VideoPlayer::OpenFile:plugin://plugin.video.arteplussept/play/SHOW/069083-002-A" | grep -oE "\w+(?=\/play)/g" -

Expect: arteplussept

Solution

You need to

• Use the PCRE regex engine, with -P option, not -E (which stands for POSIX ERE)
• Remove /g, grep -o extracts all matches and there is no need to "embed" this modifier into the pattern
• There is no need to escape /

So, you can just use

grep -oP '\w+(?=/play)'

Answered By - Wiktor Stribiżew