dejan@X60 ~ $ sudo apt-key adv --keyserver hkp://keys.gnupg.net --recv-key 3cb9fd148f374fef [sudo] password for dejan: Executing: /tmp/tmp.WayGMPFXKJ/gpg.1.sh --keyserver hkp://keys.gnupg.net --recv-key 3cb9fd148f374fef gpg: requesting key 8F374FEF from hkp server keys.gnupg.net gpg: key 8F374FEF: "EMC Archive Signing Key " not changed gpg: Total number processed: 1 gpg: unchanged: 1 dejan@X60 ~ $ sudo add-apt-repository "deb http://linuxcnc.org/ precise base 2.7-rtai" dejan@X60 ~ $ sudo apt-get update Ign:1 http://mirror.pmf.kg.ac.rs/mint/packages.linuxmint.com serena InRelease Hit:2 http://mirror.pmf.kg.ac.rs/mint/packages.linuxmint.com serena Release Hit:3 http://archive.canonical.com/ubuntu xenial InRelease Hit:4 http://archive.ubuntu.com/ubuntu xenial InRelease Get:5 http://security.ubuntu.com/ubuntu xenial-security InRelease [102 kB] Get:6 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [102 kB] Get:8 http://archive.ubuntu.com/ubuntu xenial-backports InRelease [102 kB] Ign:9 http://linuxcnc.org precise InRelease Get:10 http://linuxcnc.org precise Release [49,5 kB] Get:11 http://linuxcnc.org precise Release.gpg [181 B] Get:12 http://linuxcnc.org precise/base i386 Packages [20,7 kB] Get:13 http://linuxcnc.org precise/2.7-rtai i386 Packages [14,2 kB] Fetched 391 kB in 2s (141 kB/s) Reading package lists... Done dejan@X60 ~ $ dejan@X60 ~ $ sudo apt-get install linux-headers-3.4-9-rtai-686-pae Reading package lists... Done Building dependency tree Reading state information... Done linux-headers-3.4-9-rtai-686-pae is already the newest version (3.4.55-4linuxcnc). 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. dejan@X60 ~ $ sudo apt-get install rtai-modules-3.4-9-rtai-686-pae Reading package lists... Done Building dependency tree Reading state information... Done rtai-modules-3.4-9-rtai-686-pae is already the newest version (3.9.265.gd99c55e). 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. dejan@X60 ~ $ sudo apt-get dist-upgrade Reading package lists... Done Building dependency tree Reading state information... Done Calculating upgrade... Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. dejan@X60 ~ $