It's a good idea to use a different password for different services. That way, if one of those services is compromised, it only affects that service.
If you use the same password everywhere, then you should change it everywhere after a security breach. Probably not going to happen.
If you use different passwords for different services, it becomes impossible to memorize all of them. Password managers help track all of the different passwords in a secure fashion.
Encrypting a collection of passwords is necessary if you're going to store them digitally. Good solutions exist for helping you meet this goal.
KeePass is one of the older open-source solutions for tracking passwords. There are clients available for most platforms.
KeePass stores the encrypted password database locally. The tricky part is keeping your key database in sync across multiple devices. Keepass doesn't have that functionality built in. I prefer to keep the database file stored locally rather than in a cloud based service. I use git to synchronize it across devices.
KeepassXC is an updated fork of KeepassX. KeepassX is a good cross platform option.
sudo apt install keepassxc
To copy a password to the system clipboard, do not open the entry details. Ctrl-C is enabled on the find / filter list. It's not available in the details.
sudo apt-get install keepassx
KeePass.info seems to be the official desktop client
https://keepass.info/ KeePass Password Safe
https://keepass.info/help/v2_dev/customize.html 0x8 8 Disable controls to specify after how many days the master key should/must be changed.
KeePass DX is good and open source.
KeePassXC looks like another good client https://keepassxc.org/
KeeWeb may be a good option to try. Found it via the Open Collective site.
Open Source password manager
Uses a dedicated server that you can run locally to synchronize the password database.
Written in C# Docker images are provided for the server, and there are also lighter weight clones in Ruby that are available https://sgoel.org/posts/switching-from-keepassxc-to-bitwarden/
Seems like a great solution that may be easier to get started with for most people compared to KeePass.
TechRadar: Popular password manager could have a critical vulnerability. https://www.techradar.com/news/popular-password-manager-could-have-a-critical-vulnerability
Lockwise is a newer open source solution from Mozilla that is built in to Firefox:
https://www.mozilla.org/en-US/firefox/lockwise/ Firefox Lockwise — password manager — take your passwords everywhere
It looks like there may be some issues with prompting for the password to unlock the database.
https://medium.com/@JoeKreydt/how-secure-is-firefox-lockwise-password-manager-51d44dcf4dbc How secure is Firefox Lockwise password manager? | by Joe Kreydt | Medium
Here is the open issue to track the fix:
https://duckduckgo.com/?q=Lockwise&t=canonical&ia=web Lockwise at DuckDuckGo https://duckduckgo.com/?q=lockwise+vs+lastpass&t=canonical&ia=web lockwise vs lastpass at DuckDuckGo
LastPass is a popular, well regarded closed / commercial / free option. https://thenextweb.com/basics/2019/08/25/dont-be-an-idiot-heres-how-to-store-and-remember-all-your-passwords/
https://padlock.io/ Padlock - A Minimalist Password Manager https://github.com/padlock/padlock padlock/padlock: A minimalist open source password manager. https://www.passbolt.com/ Passbolt | Open source password manager for teams
https://www.google.com/search?q=open+source+password+manager open source password manager - Google Search https://hackernoon.com/the-best-password-manager-for-you-747b92c43d18 The Best Password Manager for You - HackerNoon.com