Installing "old" packages

[Joe Zeff]

On 11/07/2014 09:13 AM, Isaac Cortés González wrote:
> For example, I'm currently using Fedora 20 and I'd like to upgrade to 21
> when the it comes out; but the partition "/" is very "small" (or I have
> too much installed software) so using FedUp isn't an option.

Have you tried using some sort of cleanup program such as bleachbit (my 
preference) to get rid of extraneous files and compact databases?  Even 
if it's not enough, it's at least worth trying.