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How to grep a word and the two lines before?

 
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# 1  
Old 11-09-2011
How to grep a word and the lines before?
Hi

I have this txt file getting from a lpstat command.
Code:
XA40 XA40 0 Unknown 0 0 1 1 1
0 Unknown LPD 0 0 1 1 2
0 Unknown specified 0 0 1 1 3
XA99 @spip READY 
: (FATAL ERROR) 0781-233 Unknown host spiprs01.mon.local.
XA01 @xs00 READY 
XA01 XA01 0 Unknown 0 0 1 1 1
0 Unknown LPD 0 0 1 1 2
0 Unknown specified 0 0 1 1 3
XA07 @xs00 READY 
XA07 XA07 0 Unknown 0 0 1 1 1
0 Unknown LPD 0 0 1 1 2
0 Unknown specified 0 0 1 1 3
0 Unknown specified 0 0 1 1 3
0 Unknown 0 0 1 1 4
0 Unknown Status 0 0 1 1 5
0 Unknown 0 0 1 1 6
xA45 @diwp READY 
: (FATAL ERROR) 0781-233 Unknown host diwpsnt1.dgw.unix.com
XA32 @xs00 READY 
XA32 XA32 0 Unknown 0 0 1 1 1
0 Unknown LPD 0 0 1 1 2
0 Unknown 0 0 1 1 3
0 Unknown 0 0 1 1 4
0 Unknown Status 0 0 1 1 5
0 Unknown 0 0 1 1 6
XA64 @xs00 READY 
XA64 XA64 0 Unknown 0 0 1 1 1
0 Unknown LPD 0 0 1 1 2
 
XA10 @xs00 READY 
XA10 XA10 0 Unknown 0 0 1 1 1
0 Unknown LPD 0 0 1 1 2
0 Unknown specified 0 0 1 1 3
XA48 @xs00 READY 
XA48 XA48 0 Unknown 0 0 1 1 1
0 Unknown LPD 0 0 1 1 2
0 Unknown specified 0 0 1 1 3
XA68 @xs00 READY 
XA68 XA68 0 Unknown 0 0 1 1 1
0 Unknown LPD 0 0 1 1 2
0 Unknown specified 0 0 1 1 3
0 Unknown 0 0 1 1 4

How can i grep the word "ERROR" and the lines before (where are the id of the printer in error) and send the result to my mail?
Last edited by npatao71; 11-10-2011 at 06:30 AM.. Reason: Please use code tags
# 2  
Old 11-09-2011
If you are on Linux or have gnu tools (specific gnu grep)

Code:
grep -B 2  'FATAL ERROR'  inputfile

If not let us know.
# 3  
Old 11-10-2011
Hi

I have a AIX Version 5.3!
I try that, but for some reason, the first line with the printer id doesn't shows up!!!
# 4  
Old 11-10-2011
what is the expected output for the above posted sample ?
# 5  
Old 11-10-2011
Something like that:
Code:
XA99 @spip READY 
: (FATAL ERROR) 0781-233 Unknown host spiprs01.mon.local.
xA45 @diwp READY 
: (FATAL ERROR) 0781-233 Unknown host diwpsnt1.dgw.unix.com

Moderator's Comments:
Mod Comment You were already asked to use code tags above - please do so. You got a PM with instructions.
Last edited by zaxxon; 11-10-2011 at 06:08 AM.. Reason: code tags, see PM
# 6  
Old 11-10-2011
https://www.unix.com/shell-programmin...ing-lines.html
 
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