How to read linux bash command output and discover if match.

[Fli]

When we want to check some linux command output if contains some phrasse, or words, it can be done by adding the command output into variable like this:


varname=$(thecommandhere)

then we check if varname is equal to *example*:


[[ $varname == *example* ]] && echo "Found"


$ [[ $varname == *example* ]] && echo Found || echo Not found
Found

Maybe better way if the match is phrasse with spaces is adding this phrasse into its own variable, not directly into "If"



varname='My long string';
if [[ "$varname" == *My* ]];then
echo "It's there!";
fi

varname2=''m long"
if [[ "$varname" == *"$varname2"* ]]; then
echo "The '$varname' contains phrasse '$varname2'"
fi