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Print lines before and after..not grep -A

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# 1  
Old 04-18-2011
Print lines before and after..not grep -A
Hi

I have this in my file

Code:
[01002] 2011-04-18 15:32:11 [Root]system-alert-00012: UDP flood! From xxxxxx to yyyyyyyyyy, int ethernet0/2). Occurred 1 times.
[01003] 2011-04-18 15:32:11 [Root]system-alert-00012: UDP flood! From xxxxxx to yyyyyyyyyy, int ethernet0/2). Occurred 1 times.
[01004] 2011-04-18 15:32:11 [Root]system-alert-00008: IP spoofing! From xxxxxx to yyyyyyyyyy, int redundant1). Occurred 1 times.
[01377] 2011-04-18 15:31:52 [Root]system-alert-00012: UDP flood! From xxxxxx to yyyyyyyyyy, int ethernet0/2). Occurred 1 times.
[01378] 2011-04-18 15:31:52 [Root]system-alert-00012: UDP flood! From xxxxxx to yyyyyyyyyy, int ethernet0/2). Occurred 1 times.
[01379] 2011-04-18 15:31:52 [Root]system-alert-00012: UDP flood! From xxxxxx to yyyyyyyyyy, int ethernet0/2). Occurred 1 times.
[01380] 2011-04-18 15:31:51 [Root]system-alert-00008: IP spoofing! From xxxxxx to yyyyyyyyyy, int redundant1). Occurred 1 times.

My goal is to find how long the UDP flood is. So how do I search for a line that has "UDP flood" but the line before or after it does not have "UDP Flood"? awk or grep is prefered.

Thanks
Last edited by pludi; 04-18-2011 at 06:44 AM..
# 2  
Old 04-18-2011
Code:
grep -An

print n lines After the line found by grep
Code:
grep -Bn

print n lines Before the line found by grep
Code:
grep -Cn

print n lines of Context from the line found by grep (n before and n after)
# 3  
Old 04-18-2011
I think you got it wrongly. If I use grep -An or -Bn or -Cn it will show all lines that have UDP flood. I do not want that. I want only lines that have UDP flood but the line before or after it must NOT have "UDP flood".
# 4  
Old 04-18-2011
Can you post how your output should look like from the given sample input..?
# 5  
Old 04-18-2011
Thanks for the reply. I guess my sample input should have more lines. So let us have more input lines:

[01575] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01576] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01577] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01578] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01579] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 2 times.
[01580] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01581] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 2 times.
[01582] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01583] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01584] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01585] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01586] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01587] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01588] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01589] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01590] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01591] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01592] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01593] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01670] 2011-04-18 15:31:13 [Root]system-alert-00008: IP spoofing! From xxxxx to yyyyy, int redundant1). Occurred 1 times.
[01594] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01595] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01596] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01597] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01598] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01599] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01600] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 2 times.
[01601] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01602] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01603] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 2 times.
[01604] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01605] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01606] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01607] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01608] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01609] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01610] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01670] 2011-04-18 15:31:13 [Root]system-alert-00008: IP spoofing! From xxxxx to yyyyy, int redundant1). Occurred 1 times.
[01611] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01612] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01613] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 2 times.
[01614] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01615] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01616] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01617] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01618] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01619] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01620] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01621] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01622] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01623] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01624] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01625] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01626] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01627] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01628] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01629] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01630] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 2 times.
[01631] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01632] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01633] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01634] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01635] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01636] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 2 times.
[01637] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01638] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01639] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01640] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01641] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01670] 2011-04-18 15:31:13 [Root]system-alert-00008: IP spoofing! From xxxxx to yyyyy, int redundant1). Occurred 1 times.
[01642] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01643] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01644] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01645] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01646] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01647] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01648] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01649] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01650] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01651] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01652] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01653] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
016703] 2011-04-18 15:31:13 [Root]system-alert-00008: IP spoofing! From xxxxx to yyyyy, int redundant1). Occurred 1 times.
[01654] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01655] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01656] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01657] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01658] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 2 times.
[01659] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01660] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01661] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01662] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 2 times.
[01663] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01664] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01665] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01666] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01667] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01668] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01669] 2011-04-18 15:31:15 [Root]system-alert-00008: IP spoofing! From xxxxx to yyyyy, int redundant1). Occurred 1 times.
[01670] 2011-04-18 15:31:13 [Root]system-alert-00008: IP spoofing! From xxxxx to yyyyy, int redundant1). Occurred 1 times.
[01671] 2011-04-18 15:31:11 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01672] 2011-04-18 15:31:11 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01673] 2011-04-18 15:31:11 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01674] 2011-04-18 15:31:11 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01675] 2011-04-18 15:31:11 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01676] 2011-04-18 15:31:11 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01677] 2011-04-18 15:31:11 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01678] 2011-04-18 15:31:11 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01679] 2011-04-18 15:31:11 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01680] 2011-04-18 15:31:11 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01681] 2011-04-18 15:31:11 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01682] 2011-04-18 15:31:11 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01683] 2011-04-18 15:31:11 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01684] 2011-04-18 15:31:11 [Root]system-alert-00008: IP spoofing! From xxxxx to yyyyy, int redundant1). Occurred 1 times.

The output should look like this:

[01670] 2011-04-18 15:31:13 [Root]system-alert-00008: IP spoofing! From xxxxx to yyyyy, int redundant1). Occurred 1 times.
[01594] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01670] 2011-04-18 15:31:13 [Root]system-alert-00008: IP spoofing! From xxxxx to yyyyy, int redundant1). Occurred 1 times.
[01611] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01670] 2011-04-18 15:31:13 [Root]system-alert-00008: IP spoofing! From xxxxx to yyyyy, int redundant1). Occurred 1 times.
[01642] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
016703] 2011-04-18 15:31:13 [Root]system-alert-00008: IP spoofing! From xxxxx to yyyyy, int redundant1). Occurred 1 times.
[01654] 2011-04-18 15:31:15 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01670] 2011-04-18 15:31:13 [Root]system-alert-00008: IP spoofing! From xxxxx to yyyyy, int redundant1). Occurred 1 times.
[01671] 2011-04-18 15:31:11 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01683] 2011-04-18 15:31:11 [Root]system-alert-00012: UDP flood! From xxxxx to yyyyy, int ethernet0/2). Occurred 1 times.
[01684] 2011-04-18 15:31:11 [Root]system-alert-00008: IP spoofing! From xxxxx to yyyyy, int redundant1). Occurred 1 times.

Thanks
# 6  
Old 04-18-2011
try this:
Code:
awk '/UDP flood/{flood=$0; if(line){print line ORS $0;line=""}} !/UDP flood/{line=$0; if(flood){print flood ORS $0;flood=""}}' file

# 7  
Old 04-18-2011
Sorry for misunderstanding you. Try this :
Code:
grep -v "UDP flood" -A1 filename | grep -vE '^--$'

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