Home > bash > Check the number of arguments in a bash script

Check the number of arguments in a bash script

Problem
My bash script requires a parameter. How to check its presence?

Solution

#!/bin/sh

if [ "$#" -ne 1 ]
   then
      echo "Usage: $0 <input_file>"
      exit 1
fi
# else
# work with "$1" ...
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Categories: bash Tags: ,
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