Another great password manager is KeePass, unfortunately is only available for windows and android, no linux. It have an embedded password generator, that permit you to choose the length and what kind of characters use (upper / lower / numbers / special char etc.) I use it by almost 7 - 8 years, and is a great tool, you only need to remember one password to unlock it, and the program give you access to all your password, and other info you can memorize in it, in an encrypted file that depends from the password you choose to lock it. Have also a built in feature to type (with a modifiable syntax) using CTRL+v your user, and password on the site / program / application, you need to unlock, emulating the typing of the keyboard, it clear the copy buffer also if you use it for copy and paste, and have a method of obfuscation of the characters it sends to the browser/program, to have another chance more to bypass eventually keylogger that malware could install on the machine.