Login with ssh command from another computer is normally easier than using the terminal on the phone itself (bigger screen and proper keyboard). I normally turn off remote connection when I do not need to login.

Some minimalists like the default vi/vim editor, I prefer emacs editor from Storeman/Warehouse, other alternatives also exist for editing files, often an idea to take a backup before you change.

To copy files to/from phone you can use sftp command or a sftp tool on your computer.

The File Browser app can be handy on the phone.

Communication through USB connection is for Jolla a more tricky than WiFi.

Generelly a phone which is fun to check out and learn from.

Of smaller changes one can do is e.g;
- changing blue tooth config so handless is not alllowed to trigger unwanted a (re)call if butten is too easy to hit
- setting up a softlink so gpodder download files to SD card.
- added ssh keys for password less login (same way as on linux machines) using ~/.ssh folder
- write some scripts for run some frequent needed tasks
- install some compilers