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Bad post. This will cause the script to crash if presented with a valid parameter like "Bangalore" because it will try to execute a program called "Bangalore".
Try it.


Stick to test. It's a...

This is Useless Use of Cat (http://partmaps.org/era/unix/award.html), this is sufficient:
result=`grep $1 file.txt`

change if [ $result -eq $1 ]
to if [ "$result" = "$1" ]

-eq only works for integers, and you can pass ant string as $1, You may also want to change your grep to grep -F "$1". This -F lets you...