Writing "tail -f" output to another file

Fresh3 days ago

Mar 15, 202672308 views

Confidence Score0%

Problem

As a continuation from my last post where I have used to find occurences of "rare" events. I would like to record this in another file. I've tried turning into The file gets created, but nothing is populated, is this a caching issue or otherwise? How would I get a real-time appending of my tail's o…

Error Output

tail -f log.txt | egrep 'WARN|ERROR'

Unverified for your environment

Select your OS to check compatibility.

Your OS

OS version

Product version

1 Fix

Canonical Fix

Unverified Fix

New Fix – Awaiting Verification

Fix for: Writing "tail -f" output to another file

Low Risk

Buffering is the problem. Do it this way, Confirmed to work on Cygwin too.

Awaiting Verification

Be the first to verify this fix

Writing "tail -f" output to another file

Problem

Error Output

1 Fix

Fix for: Writing "tail -f" output to another file

Environment