If you want to connect to eduroam from GSI without using Network Manager and the like, use this as your wpa_supplicant.conf and adjust identity and passwort accordingly.

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=DE

network={
ssid="eduroam"
key_mgmt=WPA-EAP
ca_cert="/etc/ssl/g_rootcert.cer"
identity="w.eblogin"
anonymous_identity="anonymous@gsi.de"
eap=TTLS
password="YOURSECRETPASSWORD"
phase1="peaplabel=0"
phase2="auth=MSCHAPV2"
}

-- BastianNeuburger - 2016-10-17
Topic revision: r1 - 2016-10-17, BastianNeuburger