When updating form ubuntu 12 to 13 my firebird 2.1 was uninstalled. Now, when I try to install it, it seems that the package is obsolete.
root@ricardo-pc:/# apt-get install firebird2.1-classic
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package firebird2.1-classic 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 'firebird2.1-classic' has no installation candidate
How can I install it?