Shell Programming and Scripting

Can I add a word of caution that the lines in your exclude file will match anywhere on the line in your input file. If you need to ensure that it is (for example) only lines starting with abc then your exclusion file should be written as ^abc

So, for the input file:-

Code:

abc123
def456
123abc
456def
The end

... and the exclusion file:-

Code:

abc

you would get just:-

Code:

def456
456def
The end

If you exclusion file is

Code:

^abc

... then the output would be:-

Code:

123abc
def456
456def
The end

If you want to exclude lines with the listed patterns in other specific places then there are usually ways to do that too.

I hope that this helps avoid a problem (if it even exists)
Robin