How to tail server.log and grep multiple text combination?

Question

The server log is too large, I would like to grep the logs which has "/API/login" and "/API/init" from the server log.

I'm able to use:

tail -f /server.log | grep -i "/API/login"

to capture those with "/API/Login"

How to add in another condition to include "/API/init" as well?

I've tried this but couldnt work:

tail -f /server.log | grep -i "/API/login" || grep -i "/API/init"

Another thing is how to output this filtered logs to a text file?

Thank you.

You can pass multiple expressions to grep using `-e`, or use a regex to grep for `/API/(init|login)` — Ginnungagap, Jul 07 '20 at 08:21

score 1 · Accepted Answer · answered Jul 07 '20 at 11:18

You can do it with -e flag

From the man page:

-e pattern, [...] This option is most useful when multiple -e options are used to specify multiple patterns, or when a pattern begins with a dash (`-').


 tail -f /server.log | grep -ei "/API/login" -ei "/API/init"

How to tail server.log and grep multiple text combination?

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