I'm using the following command
tail -f /mydir/myfile | grep "searchterm" >> outfile
Without the -f
it works fine, but with the -f
, which I need, nothing is written to the file. The following outputs to the console just fine
tail -f /mydir/myfile | grep "searchterm"
What do I need to do in order to get my command to correctly write out to a file?
Best Answer
If you have GNU
grep
:Which will write every line, for a performance penalty.
Alternatively, wait for more output. If you're killing the processes, just kill the
tail
process and the buffer should flush beforegrep
exits.