This example uses Graphical User Interface (GUI) and the Ubuntu Linux distribution.
Wireless configuration for Unix-based systems without going through a GUI is done by editing or creating the wpa_suppicant.conf file. This file is often times located under the /etc directory.
Example of the contents of /etc/wpa_supplicant.conf configured for EKU's wireless
scan_ssid=1 #this will enable scanning for hidden networks
ca_cert="/etc/ssl/certs/Addtrust_External_CA.pem" # this is the path to the cert on your system
In this case you will likely have to locate the Addtrust_External_CA.pem certificate and place in the proper directory and modify the ca_cert line as in the sample file above to reflect the certificate's location on your system.
Further details for connecting to a wireless network on a Unix based system will vary by version. This support article conveys the general configuration settings for connecting to eku_secure. For further detail refer to your particular distribution documentation.