Find Lines that DO not begin with certain Strings

[kkitt]

I have been able to create and Regular Expression that finds all the lines that begin with the following phrases (HDR,SHP,BIL,INS,CNT).

^((HDR)|(SHP)|(BIL)|(INS)|(CNT))

What I need to be able to find is all lines that DO NOT match these. I have tried multiple things and it either still finds one of these or nothing at all.

Thanks in advance

 

[columb]

I'm not sure what you're using to interpret your regex but, using AIX 5.1 egrep

data

one this is a line
two this is a line
three this is a line
four this is a line
five this is a line

then

egrep "^one|two" data.file

returned the firs two lines and

egrep -v "^one|two" data.file

returned the last three
Does this help

Columb Healy

 

[predamarcel]

at least in gawk, you can do:

awk '!/^((one)|(two))/{print $0}' data.txt

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