system ("cat file.txt |grep "Baki" |tail -1");
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As a Perl one-liner, from the Unix command line, that would be:

perl -ne '/Baki/ and $x=$_}{print$x' file.txt
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or:

perl -ne '/Baki/ and $x=$_; END{print$x}' file.txt
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Update: BTW, your shell solution:

cat file.txt |grep "Baki" |tail -1
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should read:

grep 'Baki' file.txt |tail -1
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Tom Christiansen once wrote long ago on usenet something like "If you find yourself calling cat with just one argument, you're probably doing something silly".

Update: See also Re: perl one liner for csv file one field (useless use of cat and other awards References)

perl -e 'print((grep/Baki/,<>)[-1])' file.txt
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