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- What is the difference between tail -f and tail -F?
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 to var log messages 1 tail with -f will still listen to the old inode that points to messages 1 tail with -F will realize this and read the
- 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)
- How to quit `tail -f` mode without using `Ctrl+c`?
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 can become your trigger task > filename log task_pid=$! tail -f filename log tail_pid=$! while [ 1 ] do # -0 is a special "poke" signal - "are you around?"
- tail - cat line X to line Y on a huge file - Unix Linux Stack Exchange
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) The only efficiency advantage of a single tool approach that does not use pipes is fewer processes (and thus less overhead)
- logs - `tail -f` until text is seen - Unix Linux Stack Exchange
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 default, and exit after it sees that line The tail process will stop when it tries to write the next line and sees its output pipe is broken
- Show tail of files in a directory? - Unix Linux Stack Exchange
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 $(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
- How to tail multiple files using tail -0f in Linux AIX
tmux new-window -a -n Tail tmux new-session -d -s Tail -n SSH0 -d tmux selectp -t Tail #This is tmux interactions with the user (colors of the tabs used, hot keys, etc ) tmux bind-key -n M-Left previous-window -t WinSplit tmux bind-key -n M-Right next-window -t WinSplit tmux set-window-option -g monitor-activity on tmux set -g visual-activity
- logs - How to tail -f multiple files and grep each file individually in . . .
My knowledge is that I can use tail -f file1 log file2 log file3 log | grep string that gives me desired output of all three files separated by ==> fileX <== separators Same approach I use for last two files tail -f file4 log file5 log That is gives me what I need but those are separated commands
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