Le 14/07/2016 à 21:37, Nicholas Geovanis a écrit : > I have 2 servers running Jessie. They now have identical > /etc/apt/sources.list. One server can find the nagios3 packages using > apt-get, the other server can't find them. How do I go about debugging > the second server's inability to find my packages of interest? > Thanks.....Nick Geo Check /etc/apt/sources.list.d/*, /etc/apt/preferences and /etc/apt/preferences.d/*