On 2017-06-06, Daniel Ruiz Molina <daniel.ruiz at caos.uab.es> wrote: > Hello, > > how can I disable user list that has been logged, at least, one time > into X environment in Gnome running Centos 7? > > Thanks. I think this is what you're looking for: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Desktop_Migration_and_Administration_Guide/customizing-login-screen.html#disable-user-list -- Liam