In the properties menu of this folder the permission is set to "root" user and group, it shows the message "you are not the owner, so you cannot change these permissions." I am indeed the owner and only user of the machine, how can I change the permissions?
This is not telling you that you don't own the computer on which the folder exists. It's telling you that you don't own the folder. This is a very different concept of ownership.
On your Ubuntu system, your user account doesn't automatically have the ability to perform any possible action--some administrative actions can only be performed by
You should check out the three links above. Once you've read that, if you still want to change the permissions on that folder, here's one way to do it:
Before you change the permissions (and/or ownership) on this folder, you should be aware that doing this to system files in Ubuntu can have negative consequences: you can make your system insecure...or even stop your system from working.
If these files have the wrong ownership/permissions because you brought them over from another system and did so as
But if these are systemwide configuration files, programs, or you're not sure what they are but you're trying to follow instructions that tell you to do something with them ...then you'll be much better off to ask specifically about them. You can edit your question or post a new question to ask if it would be safe for you to change ownership/permissions for this specific folder (provided that you can disclose what this folder is and what you are trying to accomplish).