tail -f fill not retry and load the new inode, tail -F will detect this. The same effect will happen if you rename/move a file. If you for example follows /var/log/messages and logrotate rotates the log …

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 …

May 3, 2021 · Depending on your shell and your data, echo "$(tail -n1 file1),$(tail -n1 file3)" >>file2 may or may not work. It's guaranteed to work if the first column doesn't start with - and …

You can think of -f as "follow". When -f is added to tail, the command will not exit but waits to see if more is added to the file; that additional text will be printed by tail. You normally kill a tail -f …

In addition, tail will not read any more than head, so thus we have shown that head | tail reads the fewest number of lines possible (again, plus some negligible buffering that we are ignoring). …

Note that this spawns a new tail process every second, which might or might not be something you care about. Also, be sure to specify a sub-second interval (e.g. watch -n 0.1) to simulate …

Aug 22, 2017 · Answers differ based on context. To quit tail -f elegantly, you will need a trigger. Assume you are trying to monitor output of a task that will finish at some point in time - that …

You can pipe the tail -f into sed, telling it to quit when it sees the line you're searching for: tail -f /path/to/file.log | sed '/^Finished: SUCCESS$/ q' sed will output each line it processes by …

Jul 15, 2018 · tail already has a -f (--follow) option to poll files for appended content - the trick is to prevent the output from being buffered when you add a pipe to do the line ending …

Nov 28, 2013 · Barring your files don't include strange characters in their names, such as spaces, new lines, etc. A simple pipe to tail -n 200 should suffice. Example. Sample data. $ touch …