Cannot rename files or folders in Nautilus

It seems like this may be a bug in Nautilus, you may need to use the terminal to rename files for the time being until this bug gets fixed. This also could be a file permission issue.

Open up a terminal window and type in the following command to view the folder permissions:

cd temp && ll

Once you have done this, type in the following command (keep in mind you will need super user privileges for this, and NewFolderName would be the new name of the folder):

sudo mv "./Untitled Folder" "./NewFolderName"

Of course, if you do not feel comfortable with using the command line every time you want to rename files or folders, perhaps you could try a different file manager like Thunar.

To install Thunar, open up a terminal window and type in the following command:

sudo apt install thunar

It's simply a behavioural issue, nothing is going wrong here, let me explain

The folder has been created with a default name, you use the F2 key to change the name You don't change file/folder names in Nautilus by clicking on the text of the item, you must press F2

If you begin to enter text in Nautilus like this you will simply be running a search in the folder that is open for something beginning in said text, here you have searched for the term test, if there is more then one item that begins with the word test you use the cursor keys to navigate your selection

If you find yourself uncomfortable with the GNOME shell, you may want to consider using KDE, or Kubuntu, you may even want to install KDE alongside your GNOME Unity shell, "sudo apt-get install kubuntu-full" in your terminal will do this for you, feel free to explore some of the smaller desktop environments, some will give you a real performance boost if you are trying to be minimalistic, but that goes out of the scope of this question...... Explore!

If you are loosing focus, there maybe something wrong with your keyboard setup or another application may be stealing it, shift keys come in handy when you are in rename mode

Forgive me if I lost focus on the topic here

I believe you are suffering from a side effect of having Focus follows mouse turned on. When you choose rename from the drop down menu, the menu disappears leaving the pointer over empty space in the window which then takes focus away from the folder name and the unwanted results are exactly as described in Steves answer.

To resolve this problem, use Compiz Config Settings Manager. If you don't have it you can install it as follows:

1) Enable the Universe Repository.

2) Install Compiz Config Settings Manager either from the software center or via the terminal with sudo apt-get update && sudo apt-get install compizconfig-settings-manager

One installed, run it and click OK regarding the caution.

Choose General, then General options.

Choose the Focus and Raise behavior tab and match the settings as shown below:

Note that Auto-Raise is unchecked. You should likely also look at the next tab over key bindings and insure that the Raise Window bindings for keyboard and mouse are disabled or at least set in a manner that you aren't inadvertently triggering them.

To accomplish the same result with Unity Tweak Tool change your settings to match as shown below:

Note that auto raise is off.

Edit: If all else fails, as a workaround try nemo (a fork of nautilus) that has worked for me when nautilus was acting up.

If anything about this answer is unclear, please drop me a comment and I'll do my best to clarify.

In terminal, run

$ cd
$ ls -la
$ cd temp
$ ls -la

You should see why the gui is not working. I suspect your file permissions are different than you think.

I fixed this:) Just turn off the Viewport Switcher in CompizConfig->Desktop->Viewport Switcher