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How to start and end tail in Bash?
Put a timeout on the read, tail -f logfile | read -t 30 line Start tail with –pid=$$, that way it’ll exit when the bash-process has finished. It’ll cover all cases I can think of (server hangs with no output, server exits, server starts correctly).
What does the tail f do in Bash?
the -F will ‘read’ the file even if it doesn’t exist (start reading it when it appears). The -n0 won’t read anything already in the file, so you can keep appending to the logfile instead of overwriting it each time, and to standard log rotation on it.
Is there a way to read tail file?
The -n0won’t read anything already in the file, so you can keep appending to the logfile instead of overwriting it each time, and to standard log rotation on it. EDIT: Ok, so a rather crude ‘solution’, if you’re using tail.
How to stop tail command in script Stack Overflow?
You can execute tail in the background while redirecting its output to another file (e.g. /tmp/mylog) and write the pid of the process somewhere in a pid file (e.g. ~/mytail.pid ): Then, you can see the content of the log that you gathered in the meantime (it is also a good idea to remove it later):
How to quit tail mode without using Ctrl-C?
As said in the comments, Ctrl-C does not kill the tail process, which is done by sending either a SIGTERM or SIGKILL signal (the infamous -9 …); it merely sends a SIGINT which tells tail to end the forward mode and exit. In less, you can press Ctrl-C to end forward mode and scroll through the file, then press F to go back to forward mode again.
Is it possible to stop tailing a file?
Yes, but you will have hard time doing it – because the first command will continue to tail the file on your screen. You will have to copy paste the second line on the terminal and press ENTER. If you do it right, the tailing output on screen should stop.