In C programming language, probably you have heard of command line arguments. In shell script, we can pass arguments in the similar way. The ith argument is received by $i, for example, the first argument is received by $1. The number of arguments is determined by $#.
Copy content of a file to another
In the following example, the name of the source and destination files are received as arguments.
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#!/bin/bash
if [ $# -eq 2 ]
then
cp $1 $2
else
echo "Usage: program.sh <source_file> <dest_file>"
fi
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