Watch contents of a file grow

tail -n 0 -f /var/log/messages
In this case, I'm keeping an eye on /var/log/messages, but of course any file will do. When I'm following a file, I generally don't want to see anything other than what has been added due to the command or service I've executed. This keeps everything clean and tidy for troubleshooting.

3
By: atoponce
2009-03-02 14:21:18

What Others Think

Never thought about that. It's true when you monitor a log file, only new lines are of any interest !
CodSpirit · 633 weeks and 1 day ago
Good idea :)
raphink · 633 weeks and 1 day ago
You can use it without "-n 0". Just tap enter several times to get some free space between old and new lines. This might be helpful by watching logfiles - while - they grow.
Bender · 633 weeks and 1 day ago
I find it useful to associate this with screen splitting in screen. From within a screen session : ^A S : split the screen tail -n 0 -f /var/log/syslog ^A ^I : focus on the second panel ^A ^C : create a new screen session in the panel Do your actions in the second panel while you watch your file in the panel on top. Use ^A ^I to switch between panels.
raphink · 633 weeks ago
@raphink why not use Yakuake and you have your log to your right and you can keep executing commands in your left.
wrongloop · 625 weeks and 2 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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