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Delete lines starting with these strings

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# 1  
Old 07-25-2013
Delete lines starting with these strings
Platform : RHEL 5.8


I have text file called myapplication.log . In this file, I have around 800 lines which start with the followng three strings

Code:
PWRBRKER-3493
PWRBRKER-7834
SCHEDULER-ERROR

How can I delete these lines in one go ?
# 2  
Old 07-25-2013
Have you read the manual pages for egrep?

Have a look at the -v option and consider the special character ^ meaning the start of the record.


Does this help you out?



Robin
Liverpool/Blackburn
UK
This User Gave Thanks to rbatte1 For This Post:
omega3
# 3  
Old 07-25-2013
Thank you Robin. My requirement is to delete those lines. So grep or egrep won't help.
# 4  
Old 07-25-2013
Quote:
Originally Posted by omega3
Thank you Robin. My requirement is to delete those lines. So grep or egrep won't help.
This is what Robin meant:
Code:
egrep -v "^PWRBRKER-3493|^PWRBRKER-7834|^SCHEDULER-ERROR" myapplication.log > tmp; mv tmp myapplication.log

This User Gave Thanks to Yoda For This Post:
omega3
# 5  
Old 07-25-2013
Thank you very much Yoda.
# 6  
Old 07-26-2013
Code:
awk '!/^PWRBRKER-3493|^PWRBRKER-7834|^SCHEDULER-ERROR/' myapplication.log

# 7  
Old 07-26-2013
if you want to delete first 3 lines compulsorily, without matching the patterns then you can use
Code:
sed '1,3d' myapplication.log > myapp;mv myapp myapplication.log

deletes the 1st 3 lines from the file.
This User Gave Thanks to Little For This Post:
rbatte1
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