Linux Shout published a tutorial about how to upgrade Linux Mint 19.3 (Tricia) to Mint 20.1 (Ulyssa).
How to upgrade Linux Mint 19.3 (Tricia) to Mint 20.1 (Ulyssa)
Easy step by step tutorial to upgrade Linux Mint 19.3 Tricia to Linux Mint 20.1 Ulyssa 64-bit distro using command terminal & mintupgrade
How to upgrade Linux Mint 19.3 (Tricia) to Mint 20.1 (Ulyssa) - Linux Shout