The user.cfg defines the users that are present in the Fabric. These usernames can be added to one or more groups in the group.cfg. See Application Security for more information.

To edit the user.cfg, get the current version from the fabric using fabric_ctl.

$ fabric_ctl -d239.255.0.1:30000 -ufabric-admin/fabric-admin get user.cfg

The user.cfg file has a default administrative user, fabric-admin, with the password fabric-admin. You are responsible for changing the password during installation. The administrative user has access to all administration activities.

fabric-admin=d878040b4029d8d56c98daf969ee7cdf
version=1.0

Use the fabric_user command line utility to update the user.cfg file.

$ fabric_user add fred garvin
added user: fred

$ cat user.cfg 
fabric-admin=d878040b4029d8d56c98daf969ee7cdf
fred=019ff078ed64965ace8076d8d6d231c4
version=2

Once the configuration file is updated, deploy it back to the fabric.

$ fabric_ctl -d239.255.0.1:30000 -ufabric-admin/fabric-admin deploy user.cfg