dennis@ubuntu:~$ sudo sed -e 's/us.archive/archive/' -i /etc/apt/sources.list
dennis@ubuntu:~$ sudo apt-get install gstreamer0.8-plugins
Reading package lists... Done
Building dependency tree... Done
Package gstreamer0.8-plugins is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
W: Couldn't stat source package list http://archive.ubuntu.com hoary/main Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_hoary_main_binary-i386_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://archive.ubuntu.com hoary/restricted Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_hoary_restricted_binary-i386_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://archive.ubuntu.com hoary/main Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_hoary_main_binary-i386_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://archive.ubuntu.com hoary/restricted Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_hoary_restricted_binary-i386_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://archive.ubuntu.com hoary/universe Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_hoary_universe_binary-i386_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://archive.ubuntu.com hoary-updates/main Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_hoary-updates_main_binary-i386_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://archive.ubuntu.com hoary-updates/restricted Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_hoary-updates_restricted_binary-i386_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://archive.ubuntu.com hoary-updates/main Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_hoary-updates_main_binary-i386_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://archive.ubuntu.com hoary-updates/restricted Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_hoary-updates_restricted_binary-i386_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://archive.ubuntu.com hoary/main Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_hoary_main_binary-i386_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://archive.ubuntu.com hoary/restricted Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_hoary_restricted_binary-i386_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://archive.ubuntu.com hoary/main Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_hoary_main_binary-i386_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://archive.ubuntu.com hoary/restricted Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_hoary_restricted_binary-i386_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://archive.ubuntu.com hoary/universe Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_hoary_universe_binary-i386_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://archive.ubuntu.com hoary-updates/main Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_hoary-updates_main_binary-i386_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://archive.ubuntu.com hoary-updates/restricted Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_hoary-updates_restricted_binary-i386_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://archive.ubuntu.com hoary-updates/main Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_hoary-updates_main_binary-i386_Packages) - stat (2 No such file or directory)
W: Couldn't stat source package list http://archive.ubuntu.com hoary-updates/restricted Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_hoary-updates_restricted_binary-i386_Packages) - stat (2 No such file or directory)
W: You may want to run apt-get update to correct these problems
E: Package gstreamer0.8-plugins has no installation candidate