KeePass is a free open source password manager. Passwords can be stored in an encrypted database, which can be unlocked with one master key.

HELP
https://keepass.info/help/v2/setup.html

How to Install KeePass on Linux Mint 20
https://linuxways.net/mint/how-to-install-keepass-on-linux-mint-20/

To import from Bitwarden to KeepassXC, there are a few options available.2 One option is to use KeePass, which has a built-in import method for Bitwarden JSON files.3 Another option is to export the Bitwarden vault as a csv and then make the KeePassXC one look like the Bitwarden one. However, some users have reported issues with importing from Bitwarden to KeepassXC.2 One workaround is to use Keepass2 and export it to kdbx, but it is not straightforward.1 Another option is to export the unencrypted KeePass XML file, import it into the Bitwarden vault, and then delete the XML file. However, Bitwarden ignores binary attachments in its import functionality.0