NetworManager and its command-line tools should be installed.

$ nmcli con add type wifi ifname wlp1s0 con-name eduroam ssid eduroam
$ nmcli con edit id eduroam
nmcli> set ipv4.method auto
nmcli> set 802-1x.eap peap
nmcli> set 802-1x.phase2-auth mschapv2
nmcli> set 802-1x.identity username@unl.edu
nmcli> set 802-1x.password userpassword
nmcli> set wifi-sec.key-mgmt wpa-eap
nmcli> save
nmcli> activate