if string contains bash code example
Example 1: check if variable contains string bash
STRING='Hello world'
if [[ $STRING =~ "Hello" ]] ; then echo "It's here" ; fi
Example 2: checking if a substring exists in a string bash
string='Haystack';
if [[ $string =~ "Needle" ]]
then
echo "It's there!"
fi
Example 3: bash if substring
string='Hi substring'
if [[ $string == *"substring"* ]]; then
echo "String has substring"
fi
Example 4: bash substring test
#!/bin/bash
STR='GNU/Linux is an operating system'
SUB='Linux'
case $STR in
*"$SUB"*)
echo -n "It's there."
;;
esac