Ubuntu users must create file /etc/apt/sources.list.d/indexdata.list and use Ubuntu own package management tools, apt-get or apt. Replace xxxx in indexdata.list with your version of Ubuntu. Use grep CODENAME /etc/lsb-release to determine your Ubuntu release. # For Ubuntu jammy 22.04 or later proceed as follows: /etc/apt/sources.lists.d/indexdata.list should have the following content: deb [signed-by=/usr/share/keyrings/indexdata.gpg] https://ftp.indexdata.com/ubuntu xxxx main deb-src [signed-by=/usr/share/keyrings/indexdata.gpg] https://ftp.indexdata.com/ubuntu xxxx main Get indexdata.gpg key: sudo wget -O /usr/share/keyrings/indexdata.gpg \ https://ftp.indexdata.com/debian/indexdata.gpg # For older Ubuntu relases: /etc/apt/sources.lists.d/indexdata.list should have the following content: deb https://ftp.indexdata.com/ubuntu trusty main deb-src https://ftp.indexdata.com/ubuntu trusty main These packages are signed with a key you can install as follows: wget https://ftp.indexdata.com/debian/indexdata.asc sudo apt-key add indexdata.asc