How do I change the runlevel?

How can i change the runlevel in ubuntu 10.04 or 10.10 As far as I can recall ubuntu changed the runlevel with something else?

If I want to change the start to terminal only and not X what and r

Solution 1:

To make Ubuntu boot directly to console and not X, you have to do the following:

1. Open /etc/default/grub in your favorite text editor as root (e.g. gksudo gedit /etc/default/grub)

2. Locate the following line:

   GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
   

3. Replace "quiet splash" with "text" (i.e., GRUB_CMDLINE_LINUX_DEFAULT="text"). If you have a specific runlevel in mind, use that number (for runlevel 3: GRUB_CMDLINE_LINUX_DEFAULT="3").

4. Save the file

5. Run the following command:

   sudo update-grub