Synergy 1.9.1 for Ubuntu 18.0 and later
Use a single keyboard and mouse between multiple computers to control nearby computers, and work seamlessly between them.
Installation Instruction
git clone --recursive https://github.com/shuwang1/synergy.git
cd ./synergy && sudo dpkg -i libssl1.1_1.1.1f-1ubuntu2.20_amd64.deb synergy_1.9.1.modified.deb