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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
- What is the difference between tail -f and tail -F?
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 different place on your disk) tail -f fill not retry and load the new inode, tail -F will detect this
- What does tail -f do? - Unix Linux Stack Exchange
7 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
- 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 do I read the last lines of a huge log file?
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 looks from there) By not abusing cat here but letting tail read the file itself (or just using redirection, works the same!) instead, you get a much faster result
- 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
- How can I save the output of tail to my clipboard or somewhere . . . - linux
tail -n 1000 mylogfile log My process is this: SSH into server Run that tail command Copy 1000 lines of code Paste and report it in Slack What I want to achieve: Run that command Somehow get that log file on my local system as a file or in my clipboard (preferred), which is hard because of limitations I have My limitations are:
- How to monitor only the last n lines of a log file?
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 the lines before the last 15 after it has been updated Would you have an idea?
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