From the tail(1) man page: With --follow (-f), tail defaults to following the file descriptor, which means that even if a tail’ed file is renamed, tail will continue to track its end. This default …

It means tail -f command will wait for new strings in the file and show these strings dynamically. This command useful for observing log files . For example try, tail -f /var/log/messages.

Tail will then listen for changes to that file. If you remove the file, and create a new one with the same name the filename will be the same but it's a different inode (and probably stored on a …

tail -f my-file.log | grep -qx "Finished: SUCCESS" -q, meaning quiet, quits as soon as it finds a match -x makes grep match the whole line For the second part, try tail -f my-file.log | grep -m 1 …

Jan 30, 2014 · I'd like to be able to tail the output of a server log file that has messages like: INFO SEVERE etc, and if it's SEVERE, show the line in red; if it's INFO, in green. What kind of alias …

Say I have a huge text file (>2GB) and I just want to cat the lines X to Y (e.g. 57890000 to 57890010). From what I understand I can do this by piping head into tail or viceversa, i.e. head …

A simple pipe to tail -n 200 should suffice. Example Sample data. $ touch $(seq 300) Now the last 200: $ ls -l | tail -n 200 You might not like the way the results are presented in that list of 200. …

Here is what I know I can do: tail -n 15 -F mylogfile.txt As the log file is filled, tail appends the last lines to the display. I am looking for a solution that only displays the last 15 lines and get rid of …

Feb 20, 2024 · tail --bytes 100M logfile.log | tail However, if you're using GNU Coreutil¹'s tail implementation, that already does this (i.e., it seeks to the end of the file minus 2.5 kB, and …

Jul 15, 2018 · How can I continuously print the last line of a file to a single line in the terminal? The following works, but has a high performance hit. while true; do tail -1 /tmp/somelog | tr …