JOSM: Install on Linux Mint

Add package resource list:

echo "deb [arch=amd64 signed-by=/usr/local/share/keyrings/josm-apt.gpg] https://josm.openstreetmap.de/apt $(grep ^DISTRIB_CODENAME= /etc/upstream-release/lsb-release| awk -F = '{print $(2)}') universe" | sudo tee /etc/apt/sources.list.d/josm.list > /dev/null

Download the public key:

wget -q https://josm.openstreetmap.de/josm-apt.key -O- | sudo gpg --dearmor -o /usr/local/share/keyrings/josm-apt.gpg

Update sources:

sudo apt-get update

Install tested version:

sudo apt-get install josm

Or install development version:

sudo apt-get install josm-latest

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Source: https://josm.openstreetmap.de/wiki/Download#Ubuntu