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Help need on cat command

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# 1  
Old 01-24-2013
Help need on cat command
I have two files as below

1.txt

AA 123
CC 145
DD 567

2.txt

AA 111
YY 128
CC 144
FF 222
DD 777
ZZ 875

basically 1.txt is updated file, if i do cat 1.txt 2.txt output should be as below
o/p

AA 123
YY 128
CC 145
FF 222
DD 567
ZZ 875

basically 1.txt should override on 2.txt
Please share inputs if some one knows..
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# 2  
Old 01-24-2013
This was already posted in UNIX for Advanced & Expert Users forum.
# 3  
Old 01-24-2013
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