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Tail command in one line


 
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# 1  
Data Tail command in one line

HI i have to copy the last 5000 lines form a log file and copy the same in the same file .overwriting the same log file.

ex: tail -5000 testfile1 > testfile2
cat testfile2
mv tesftfile2 testfile1


will produce the correct result.but i want to have this done in one line????
# 2  
Code:
tail -5000 testfile1 > testfile2 && mv tesftfile2 testfile1

Regards
# 3  
Data one more query

Quote:
Originally Posted by Franklin52
Code:
tail -5000 testfile1 > testfile2 && mv tesftfile2 testfile1

Regards
thanks for the solution its working.

but i have one query

when i am giving
tail -5000 testfile1 > testfile1

why on seeing the content by cat tesftile1 it is blank???????Smilie
# 4  
Because you are overriding the original file (redirection empties it). Destination should be some temporary file.
# 5  
Got it

Quote:
Originally Posted by Luka
Because you are overriding the original file (redirection empties it). Destination should be some temporary file.
Thanks

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