Watching updates at the end of a file, with or without the tail utility

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1answer
71 views

Get last changed content since last read

How can I get the last changed content of a file, since its last read? Something more precise that this: tail - <nr >file_1.txt >file_2.txt where file_2.txt gets the last modified ...
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1answer
16 views

Possible to prevent multitail from closing “finished” command windows?

Assume a multitail call like the following: multitail -s 2 -l "long-running-command" -l "short-running-command" Now, I would like to have both windows remain open, even after they are finished. ...
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27 views

live tail (tail -f) of file being grepped

i can do tail -f -n20 <file> to see the last 20 lines of the file, live. If i want to grep something, tail -f <file> | grep <pattern>, it will still be live, but will only grep ...
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1answer
23 views

Head and Tail of a directory, set by the user

I have this script that will show the user the head or tail of the files that are inside a set directory (currently that is set as '~/bin/new/*'). This script works but i would like to allow the user ...
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1answer
61 views

Use tail and grep to send an IRC message?

How do I use a command like: tail -f /home/user/log.txt | grep '!calladmin\|admin' To send an IRC message to me when !calladmin or admin are posted in the log? Or is there an easier way to do ...
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139 views

Need to grep for specific lines from ongoing log and save it in some file

So, let me start with the overall outcome that i want to achieve. There is just one log, which will have info on certain devices, that i am upgrading. I use "tailf log" to monitor the log. Now, ...
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1answer
489 views

Head and tail command

How can i do this exercise in unix? Create the following command: lshead.bash – list the first few lines of every file in a directory specified by the argument. This command should also allow options ...