There are a couple of ways to connect to tamulink-wpa with Linux. Some are GUI and some are configuration file based. The settings are:

EAP method=PEAP
Phase 2 authentication=MSCHAPV2
CA certificate=(unspecified)
Identity=NetID
Password=NetIDpassword

Network manager comes stock on Ubuntu, but stability seems to be an issue. A good stable GUI application is wicd.

For using configuration files in Ubuntu: The file /etc/wpa_supplicant.conf must have the lines:

ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=netdev
update_config=1

network={
	ssid="tamulink-wpa"
	scan_ssid=1
	key_mgmt=WPA-EAP
	eap=PEAP
	identity="NetID"
	password="NetIDpassword"
	phase1="peaplabel=0"
	phase2="auth=MSCHAPV2"
	id_str="TAMU"
}

Replace NetID with your NetID and NetIDpassword with your NetID password

The configuration file can be tested with:

wpa_supplicant -Dwext -iwlan0 -c/etc/wpa_supplicant.conf

If problems occur make sure network manager was stopped:

/etc/init.d/network-manager stop

The network manager can be removed by:

aptitude remove network-manager network-manager-gnome

The file /etc/network/interfaces must have the lines:

iface wlan0 inet manual
	wpa-driver wext
	wpa-roam /etc/wpa_supplicant.conf

iface TAMU inet dhcp

A page that has more configurations for other types of networks is http://ubuntuforums.org/archive/index.php/t-419020.html