The KeePassX upstream project hasn't been updated since October 2016. A community fork called KeePassXC was started from the latest source code and now includes new features and bug fixes, and the maintainers are very active and responsive. I recommend to install that snap instead. -- elopio
KeePassX is an application for people with extremely high demands on secure
personal data management. It has a light interface, is cross platform and
published under the terms of the GNU General Public License.
Enable snaps on Linux Mint and install keepassx-elopio
Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. They update automatically and roll back gracefully.
Snaps are discoverable and installable from the Snap Store, an app store with an audience of millions.
Snap is available for Linux Mint 18.2 (Sonya), Linux Mint 18.3 (Sylvia), Linux Mint 19 (Tara), Linux Mint 19.1 (Tessa) and the latest release, Linux Mint 20 (Ulyana).
You can find out which version of Linux Mint you’re running by opening System info from the Preferences menu.
On Linux Mint 20, /etc/apt/preferences.d/nosnap.pref needs to be removed before Snap can be installed. This can be accomplished from the command line: