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- How does the tail commands -f parameter work?
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 behavior is not desirable when you really want to track the actual name of the file, not the file descrip- tor (e g , log rotation) Use --follow=name in that case That causes tail to track the
- tail - cat line X to line Y on a huge file - Unix Linux Stack Exchange
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
- shell - grep and tail -f? - Unix Linux Stack Exchange
Is it possible to do a tail -f (or similar) on a file, and grep it at the same time? I wouldn't mind other commands just looking for that kind of behavior
- Show tail of files in a directory? - Unix Linux Stack Exchange
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 For that you can control the order of the results that ls outputs through a variety of switches For example, the data I've generated is numeric
- How to quit `tail -f` mode without using `Ctrl+c`?
When I do tail -f filename, how to quit the mode without use Ctrl+c to kill the process? What I want is a normal way to quit, like q in top I am just curious about the question, because I feel
- `tail -f` until text is seen - Unix Linux Stack Exchange
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 "^Finished: " | grep -q "SUCCESS$" -m <number> tells grep to stop after number matches and the grep -q exit status will only be 0 if SUCCESS is found at the end of the line If you want to see all the
- How to have tail -f show colored output - Unix Linux Stack Exchange
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 can I set
- How to tail a log file by time? - Unix Linux Stack Exchange
How to tail a log file by time? Ask Question Asked 10 years, 8 months ago Modified 4 years, 1 month ago
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