Originally Posted by pretruder
If I add a swap file, will this interfere with my swap partition?
If not, will the system use both?
If both are enabled and if the space is necessary, Linux will use both.
What Linux distribution are you using?
The instructions to create a swap file should be easy to find and should be pretty independent of distribution, similarly the instructions to enable the swap file right after you create it.
But I think you need to do a bit more to cause the swap file to be enabled again automatically on each reboot of Linux. I'm not sure of those instructions and I think the best way of doing that may depend on which distribution of Linux you have. In case that is true, identifying your distribution will help someone, who knows more than I about swap files, to give you a better answer.