My Adobe Flash plugin has stopped working on Ubuntu 12.04. I cannot see any videos. When I try to install it again, the following things appear on my terminal:
root@ubuntu:/home/salty# sudo apt-get install adobe-flashplugin
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package adobe-flashplugin 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
E: Package 'adobe-flashplugin' has no installation candidate
root@ubuntu:/home/salty#
What should I do now?