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how to find entries, NOT starting with specific pattern

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# 1  
Old 08-08-2011
how to find entries, NOT starting with specific pattern
Hey,I have a file in following format
Code:
>1
ABC........
>2
XYZ.....
>3
ABC........
>4
MNO.......
>5
ABC.......

now I would like to find only those entries that doesn't start with ABC (specific pattern)e.g preferred output:
Code:
>2
XYZ....
>4
MNO.......


it will be nice if anybody how to do this!!!
thnx
Last edited by Scott; 08-08-2011 at 06:49 AM.. Reason: Code tags
# 2  
Old 08-08-2011
Based on your input:

Code:
$ sed "N;/\nABC/d" file
>2
XYZ.....
>4
MNO.......

# 3  
Old 08-08-2011
Code:
 
$ nawk '{m=$0;getline;m=m"\n"$0; if(m~/ABC/){m=""}else{print m}}' test                                                                             
>2
XYZ.....
>4
MNO.......

$ cat test
>1
ABC........
>2
XYZ.....
>3
ABC........
>4
MNO.......
>5
ABC.......

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