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help on egrep

 
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# 1  
Old 07-26-2008
help on egrep
HI,

I have two files filea, fileeb


filea
z283110z67
xx65686377
xx654681zz
xx652836xx
xx653881zz
xx65480z11
xx654z5466
xx65510000
xx65670000
xx656z0000
xx656z1822


fileb
z283110z67
xx65686377
xx654681zz
xx652836xx
xx653881zz
xx65480z11
xx654z5466
xx65510000
xx65670000
xx656z0000
xx656z1822
xx65370000
xx65182733
xx653z0000
xx652z36xx
xx65676377
z245330104
z245330530
z283241265
xx657136xx
xx651z81zz
xx645xx555
xx65260z11
xx65xx6377
xx654z0000
xx65265466
xx65z00000
xx65266377
xx656xx555
xx65720000
xx6516z110
xx65140000
xx65167288
z245333z77


i want to grep the contents of fileb which are not present in filea

i tried following code

egrep -vf filea fileb > filec

but segmetation error is coming and a core file is getting dumped

Pls help me

count of filea is 255418
count of fileb is 401099
# 2  
Old 07-26-2008
fileb minus what is in filea
Code:
awk ' FILENAME=="filea" { arr[$0]++ }
        FILENAME=="fileb" { if ( ! $0 in arr) {print $0}' filea  fileb

# 3  
Old 07-26-2008
You could also use a combination of sort and comm. Your egrep looks fine so I would assume it just can't handle such a large data set.
# 4  
Old 03-17-2009
above awk code is not working, pls help me
 
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