Bash script log file display to screen continuously

I am creating an application that writes to a log file, and I need to know how in Linux / Bash to continuously display the log file to the screen (updating the screen with every new开发者_如何学Python line put into the log).

So as an example, lets say I want to push a running log of apache/error.log to the screen (ssh terminal) continuously updating.

Try the tail command:

tail -f filename

Another solution is

 less +F filename

or just less filename and typing "F" into it (pressing shift+f). It can be better than tail, because it allows you to cancel continuous printing temporary, go backward to look something and reenable it with "F" (shift+f) again

The watch command can also be of use.

watch tail logfile

Would show you the last 5 lines of the log file. It can be extended to any command which prints stuff to stdout.

Yes, using tail -f is the traditional solution, but depending on what you are trying to do, this might work better.

ssh {remotehost} tail -n0f {logfile}

This will give you zero lines initially, and continuously print any new lines that appear in the file.

You can also:

less filename.txt
and press 'F'

has one plus - you can anytime CTRL-C and scroll back in log and start watching again with the 'F'.