ck-list-sessions

$ ck-list-sessions
Session5:
        unix-user = '1000'
        realname = 'lorenzo'
        seat = 'Seat6'
        session-type = ''
        active = FALSE
        x11-display = ':0'
        x11-display-device = '/dev/tty8'
        display-device = '/dev/tty1'
        remote-host-name = ''
        is-local = FALSE
        on-since = '2012-06-20T17:16:04.789130Z'
        login-session-id = '4294967295'