Bash cheatsheet: variables

bash_cheatsheet_variables.sh

echo "hello" # prints hello in the console
echo $USER # prints the value of the variable USER in the console

env # prints all the environment variables
set # prints all the local variables

MY_FRIENDS=William # create a local variable called MY_FRIENDS
MY_FRIENDS=$MY_FRIENDS:John:Anna # concatenate values 'John' and 'Anna' to MY_FRIENDS
export MY_FRIENDS # makes local variable MY_FRIENDS an environment one
unset MY_FRIENDS # deletes the variable MY_FRIENDS