There is a tool, already installed in your Linux Mint software that can help you create secure passwords fast. It’s called: apg
When you need a quick and secure password, say for a new web site you’re joining, apg is your go-too tool. Simply open a Terminal, and type apg
You will be greeted with a request to input up to 16 random characters on your keyboard. The program then takes that string and uses it to create a list of passwords that you can then use, as shown below:
Choose one the passwords, and then use it for the web site that you’re signing up for. (You can use your mouse to highlight the password, and copy it, to paste into the site’s password field) Your Firefox password manager can be used to remember it for you!