How to Install only office in Ubuntu 18.04.
Only office is free and open source software for ubuntu Linux, Windows and Mac.
used Command
1. Add GPG key:
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys CB2DE8E5
2. Add the following line in file /etc/apt/sources.list
deb https://download.onlyoffice.com/repo/... squeeze main
3.
sudo apt-get update
4.
sudo apt-get install onlyoffice-desktopeditors