Creating executable script--please help

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http://www.unix.com – Hi group, I am very beginner in shell scripting and self learning. I am trying to create and executable script to run awk from user defined variables. e.g. suppose from a given file I want to delete some rows or some columns We need to repeat this process for many files. Thus I was trying to write a script. Any help will be really great. This is my progress so far: Code: # A script to modify delete particular row and column from map and ped files osch=0 echo "1. Delete row from file" echo "2. Delete columns from file" echo "Select your choice [ (HowTos)