The radar guy wrote:
Cannot create /unix.install - Permission denied
The work will done on /unix
symbol: pcmouse_mode not found
You need to issue the command as the "root" user. The root user has permission to do just about anything on a UNIX machine, so you need to be very careful when doing anything as root. Mistype certain commands as root, and you can easily find yourself needing to reinstall your system or restore from a backup. The most important file in UNIX is /unix. Also known as the "kernel," /unix is the "system" file that controls everything that runs on a system. When you change something as root using the "systune" command, you are actually creating a new /unix file.
So, if you are not sure about what you are doing as root, you should do one of the following:
1) Find someone who is sure of what they are doing.
2) Have a backup of the system handy.
3) Have all the media needed to reinstall the operating system nearby, just in case.
I don't mean to scare you, since, as long as you are careful, you should be fine. It's just that there are real consequences if you are not careful.
Anyway, to do something as root, you will need the root password, and then you will either need to login as root or use the "su" command to become root temporarily. (su stands for Super User.) If you use the "su" command, you will be asked for the root password, then you will be able to type commands as the root user. When you are finished typing commands as root, it is very important to logout of the root account or to leave the su session. Either close the window that you were typing the su commands in, or type control-d.
The radar guy wrote:
Uh, by the way... do you have an idea of how to change the colors (text/background) of the windows? The present choice of color combinations is UGLY to say the least (and very punishing on my eyes...
Toolchest > Desktop > Customize > Color Scheme
You might want to spend some time looking at Chapter 11 of the IRIX Desktop User's Guide
for more tips. Since it sounds like your desktop was somewhat customized by a previous user, it might be worthwhile simply to create a new user account on the system to start with a "default" environment. (Just don't delete the current account. You might need information from it later.) Do you have anyone close by who has IRIX admin experience?