sed pattern to delete lines containing a pattern, except the first occurance

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# 8  
Old 10-07-2011
Originally Posted by rdcwayx
awk '/header/&&c++ {next} 1'
but how do allow for more than one regex? /header/;/header2/;/header3/ ??
# 9  
Old 10-09-2011
Originally Posted by herot
but how do allow for more than one regex? /header/;/header2/;/header3/ ??
awk 'c++&&(/pattern1/||/pattern2/||/pattern3/) {next} 1'

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