The tail tag has no wiki summary.
55
votes
12answers
11k views
How to have tail -f show colored output
I'd like to be able to tail the output of a server log file that has messages like:
INFO
SEVERE
etc, and if it's SEVERE, show the line in red; if it's INFO, in green. What kind of alias can I ...
6
votes
4answers
3k views
cat line X to line Y on a huge file
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 ...
13
votes
1answer
1k views
How to do a `tail -f` of log rotated files?
On a long running system I usually have a terminal with
$ tail -f /var/log/kern.log
or something like this open.
But from time to time I have to restart such command because no new messages are ...
4
votes
2answers
263 views
Is it possible to follow a command (run repeatedly)? as one would follow a file using tail -f?
I have a script which produces a file 'Detail.out'. I know that the script is completed whenever the file contains a certain number of lines (roughly 21025). So I find myself sitting at the command ...
15
votes
5answers
975 views
Is there a way to make tail -F beep?
Is there a way to make tail -F or less beep (ring the bell in a terminal) when new data comes in (a new line is added to the file).
Or is there any other unix utility to do this on a linux or mac.
7
votes
4answers
559 views
What is the easiest way to execute text from tail at the command line?
Sometimes I'm working on a new (ubuntu) box and I type git and am alerted:
The program 'git' is currently not installed. You can install it by typing:
apt-get install git-core
If that happens I ...
11
votes
6answers
1k views
Command to display first few and last few lines of a file
I have a file with many rows, and each row has a timestamp at the starting, like
[Thread-3] (21/09/12 06:17:38:672) logged message from code.....
So, I frequently check 2 things from this log file.
...
10
votes
7answers
6k views
grep and tail -f?
Is it possible to do a tail -f (or similar) on a file, and grep it at the same time? I wouldn't mind other commands just looking for that kind of behavior.
8
votes
1answer
153 views
How to start tailing a file that has not been yet created
I use tail to monitor the progress of jobs that I know will write their progress to disk. Almost always, I know which file they will create before they start running (the jobs are dispatched by a ...
4
votes
0answers
66 views
Combing head and tail in a single call via pipe [duplicate]
On a regular basis, I am piping the output of some program to either head or tail.
Now, suppose that I want to see the first AND last 10 lines of piped output, such that I could do something like
...
