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tail command not show on screen


 
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# 1  
Old 12-24-2008
tail command not show on screen

Hi,

I'm moniroting duplicate text with unix command (tail -f trace75747 | grep 'duplicate'), but it showed many lines then it stop show trace information although trace information in this file trace75747 always got.

What should I do?

I look forward to hearing from you.

THANKS!
# 2  
Old 12-24-2008
Tools why the -f

The -f will try to keep the file open. If this is the case, then next commands might never be executed.
For instance...
Code:
> tail -f file125 | grep "1.000" ; echo "done"

I will never see the "done", since tail is always running
# 3  
Old 12-24-2008
Bug Try test your command

Hi joeyg, I will try to test with your command and reply result 2 or 3 days because this is a problem that occur in my daily work.

Thanks,
# 4  
Old 12-24-2008
I'm not sure if I understand your problem. It sounds like you are saying that it works, then stops working.

If this trace/log file is rolled over/zero'd or whatever then tail will stop working. Basically, every time the log starts fresh you will need to start your tail -f command again.
Padow
# 5  
Old 12-24-2008
It hasn't show trace information.

Now, it still the same because of log file show duplicate text but it did not trace information. I applied already (tail -f tra.872558 | grep "duplicate" ; echo "done") according to your help.It will show immediately if run this command again.
I look foward to hearing from you.
Thanks,
# 6  
Old 12-24-2008
It hasn't still showed trace information

Now, it still the same because of log file show duplicate text but it did not trace information. I applied already (tail -f tra.872558 | grep "duplicate" ; echo "done") according to your help.It will show immediately if run this command again.
I look foward to hearing from you.
Thanks,
# 7  
Old 12-24-2008
HI, you can use following command in getting the duplicate text in file ::

uniq -d <<filename>>

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