+<https://help.ubuntu.com/community/AptGet/Howto>
+
+<https://help.ubuntu.com/community/SwitchingToUbuntu/FromLinux/RedHatEnterpriseLinuxAndFedora>
+
+ # show installed packages
+ dpkg --list
+
+ # show infor for a package
+ dpkg --status package_name
+
+ # show files owned by a package
+ dpkg --listfiles package_name
+
+ # resynchronize the package index files from their sources
apt-get update
+
+ # install the newest versions installed packages
apt-get upgrade
+
+ # install packages that are "kept back"
apt-get dist-upgrade
+ # for clearing out unused linux-headers, for example
+ apt-get autoremove
+
+## `apt-get dist-upgrade`
+
"-y Assume Yes to all queries and do not prompt" is not recommended for `apt-get dist-upgrade`
-<https://help.ubuntu.com/community/AptGet/Howto>
+http://askubuntu.com/questions/601/the-following-packages-have-been-kept-back-why-and-how-do-i-solve-it
-<https://help.ubuntu.com/community/SwitchingToUbuntu/FromLinux/RedHatEnterpriseLinuxAndFedora>
+http://askubuntu.com/questions/81585/what-is-dist-upgrade-and-why-does-it-upgrade-more-than-upgrade