not on the sudoers list

[mpg198]

Execute this

sudo visudo

It will open /etc/sudoers file in vi editor.
Append "Defaults env_reset" line with timestamp_timeout=<time_in_minutes>.

Defaults  env_reset timestamp_timeout=0

I cannot execute this because I am not on the sudoers list!

[oz]

You should be able to add yourself to the list. Try running:

sudo visudo

or

visudo

You can get more details by checking the visudo manual page:

man visudo

...or find a web version of it here:

Visudo Manual

[bigtomrodney]

Do you have a root logon or access to another user on the sudoers list? It boils down to you not being able to grant root access if you don't have it in the first place.

[mpg198]

Ya, that's the problem, I do not have root access to begin with. But thanks to this page:
Personal Fedora 10 Installation Guide

I found out I can type "su" to drop to a root terminal.

su is like sudo -i except it uses the root password and anyone who knows the root password can uses it instead of using the password of a logged on user on the sudoers list.

[Rubberman]

If you have the root password, you can add yourself to the sudoers list. Just su to root and run /usr/sbin/visudo.