How to edit files?

[OrbitzXT]

I'm about as noob as you can get in Linux. I sold my computer to buy a PS3, new TV and home theater setup and am enjoying it. I have Yellow Dog Linux up and running on the PS3 and it does the basic things I want. Its on video mode 3 right now which is 720p, I want to change it to 5 which is 1080p and my screen is capable of. I read I have to edit the kboot.conf file and I see the line I need to change, but when I do and try to save and replace it doesn't let me. How do I do this?

Also, when I hit Ctrl-Alt F1 to go into text mode, how do I get back into graphical mode? I have no idea still and keep rebooting when I need to get back in :confused:

[je_fro]

I don't know what YDL has for text editors, but I think what you need to do is launch an editor as root, then edit and save the file. You'd do this from a terminal, like
su
<enter root password>
gedit <or whatever editor you have>
<open, edit and save the file>
reboot

To get back to graphical mode, hit Alt-F7.

[OrbitzXT]

I figured out the problem, I wasn't logged on as root at the time. So anyway I followed the guide to edit the video number which was on 3, which is 720p, to 5 which is 1080p and my screen is fuly capable of. I've watched BluRay movies and played PS3 games at this resolution. So anyway I edited kboot.conf as YDL's guide suggested, rebooted only to see colorful static for a second, the some kind of error message followed by kboot:

Because of how inexperienced I am I wasn't sure how severe this problem was, I ended up having to format my PS3 and completely instal again. I have Linux instaled again and would like to change the resolution, but now am uncertain who to do it without causing the same problem. If anyone has any what the problem may have been and how to fix that too I'd like to know.

[je_fro]

Unlike some other operating systems, Linux throws _informative_ error messages. If you happen to encounter another one, write it down and post it for us to look at :)
I have zero experience with YDL, but I'm sure someone here has.... they'll come along sooner or later...