this post was submitted on 24 May 2024
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Programmer Humor

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[โ€“] [email protected] 9 points 5 months ago (2 children)

It's a command line tool which filters for all lines containing the query. So something like

cat log.txt | grep Error5

Would output only lines containing Error5

[โ€“] [email protected] 1 points 5 months ago

or if its a complex error cat log.txt|grep keyword1|grep keyword 2 and so on.

[โ€“] [email protected] 9 points 5 months ago (1 children)

You can just do

grep Error5 log.txt
[โ€“] [email protected] 12 points 5 months ago (3 children)

In the back of my mind I know this is there, but the cat | grep pattern is just muscle memory at this point

[โ€“] [email protected] 2 points 5 months ago

for me as well.

[โ€“] [email protected] 3 points 5 months ago

Just remember that if you aren't actually concatenating files, cat is always unnecessary.

[โ€“] [email protected] 3 points 5 months ago

I've been 'told off' so many times by the internet for my cat and grep combos that I still do it, then I remove the cat, it still works, and I feel better. shrug