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Compare two file and print same line

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# 1  
Old 11-11-2009
Compare two file and print same line
i want to compare two file and print same line


file1
12345 a
23456 a
45678 a
45679 a

file2
23456 a
34567 a
45679 a

output
23456 a
45679 a


any one can help me? Thank you
# 2  
Old 11-11-2009
try:
Code:
grep -f file1 file2

# 3  
Old 11-11-2009
Try this one.

comm -12 file1 file2
# 4  
Old 11-11-2009
Can done by script ? as the file are too big...
# 5  
Old 11-11-2009
this would be your simplest solution:
Quote:
Originally Posted by anchal_khare
try:
Code:
grep -f file1 file2

why do it by script? are you talking about writing the solution into a file instead of displaying the output on the screen?

if so this should work:
Code:
grep -f file1 file2 > FILE

# 6  
Old 11-11-2009
Code:
gawk 'NR==FNR{a[$0]=$0 ; next} a[$0]' file1 file2

# 7  
Old 11-11-2009
Quote:
Originally Posted by momo.reina
this would be your simplest solution:


why do it by script? are you talking about writing the solution into a file instead of displaying the output on the screen?

if so this should work:
Code:
grep -f file1 file2 > FILE


Because it shown error

PCCG1[admin]# grep -f file1 file2
grep: Regular expression too big
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