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Help with perl -pi command

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Top Forums Shell Programming and Scripting Help with perl -pi command
# 1  
Old 02-09-2011
Help with perl -pi command
Greetings to all,
I am trying to write or use a perl line command in a shell script to replace the first 9 characters on each line in a file to zero, regardless of what the first 9 characters are. This is how far I have gotten:
Code:
perl -pi -e 's/........../ filename

Thanks in advance for the help
Last edited by Franklin52; 02-10-2011 at 04:15 AM.. Reason: Please use code tags
Harleyrci
# 2  
Old 02-10-2011
Code:
perl -i -pe 's/^.{9}/0/' input_file

# 3  
Old 02-10-2011
Thanks a bunch. It works with a small modification. I need to replace the first nine characters or numbers with nine zeros. So i changed /0/ to /000000000/ it worked, but is the best method meaning do i have to type in the nine zeros into the command?
Harleyrci
# 4  
Old 02-10-2011
Mostly I used 'variables' or 'hard code info' in the replace part. For your question I tried a new way.
Code:
perl -i -pe 's/^.{9}/0 x 9/e' input_file

e - evaluation.For more info, read the perl regex modifier
# 5  
Old 02-10-2011
Greetings,
Thank you very much. Sorry for the late response, i work night shift...back to the grind.
Harleyrci
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