Most professionals use multiple highly complex passwords for every purpose so the only problem usually occurs is saving password somewhere safe and accessible. There are few good choices for storing passwords, some are online such as LastPass and some are off-line in which the passwords will be encrypted and stored in files. The best password manager application I know and ever tested is KeePass.
The main reason why KeePass 2.x is not so popular in Linux base operating system community is because this software does not have Linux or Mac version, but it is easy to run it on Linux. Mind that there are some native Linux applications such as KeePassX that can handle .kdb files which is used for KeePass 1.x but the KeePass2.x uses another file format which is .kdbx
In this tutorial, I’m going to write the best way to install KeePass on Linux. Also you can find how to install KeePass on Mac OSX in this website.