Shell Programming and Scripting

if [ `awk 'BEGIN { print index("Component", "Com") }'` -gt 0 ]
then
echo "Com"
fi

#!/bin/bash
# sub_str.sh
my_string="This is a component catalogue..."
substring="a c"
substring_length=3
subscript=0
for subscript in $( seq 0 1 $(( ${#my_string} - 3 )) )
do
	if [ "${my_string:$subscript:$substring_length}" == "$substring" ]
	then
		echo "Substring ~$substring~ found in ~$my_string~ at position $(( $subscript + 1 ))..."
	fi
done
exit 0

AMIGA:~> cd /tmp
AMIGA:/tmp> dos2unix sub_str.sh
dos2unix: converting file sub_str.sh to Unix format ...
AMIGA:/tmp> ./sub_str.sh
Substring ~a c~ found in ~This is a component catalogue...~ at position 9...
AMIGA:/tmp> _