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how to display line number for tail -f


 
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# 1  
how to display line number for tail -f

Hi,
Just wonder if there is any quick way to display line number when monitoring a log file with tail -f?
# 2  
"wc -l file" will tell you how many lines in a file.
# 3  
I haven't seen any version of tail that supports displaying line numbers at all. you would have to write a script that reads a line at a time, then displays a line number and the output.
# 4  
If you want the line numbers of the tail only
(or start the tail -f command from the begining
of the file - something like tail -fn
<number_bigger_than_the_number_of_lines_in_the_file>):

Code:
tail -f filename|nl

# 5  
Quote:
Originally Posted by iengca
Hi,
Just wonder if there is any quick way to display line number when monitoring a log file with tail -f?
You are always reading the last line Smilie
 

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