+--- search package name
+apt-cache search emacs
+--- install one package
+apt-get install emacs23-nox
+--- preparing upgrade (fetch and index latest versions of the repos)
+apt-get update
+--- actually update one package
+apt-get upgrade myslice
+--- list packages
+dpkg -l
+dpkg -l '*foo*'
+--- list (files for) one package
+dpkg -L myslice
+dpkg-deb -c myslice_0.2.4.lxc.2013.11.26_amd64.deb
+--- detailed info (e.g. to see complete version that is truncated in dpkg -l)
+dpkg -s myslice
+dpkg --info -c myslice_0.2.4.lxc.2013.11.26_amd64.deb
+