Installed free-m2m2-core-3.3.0.zip on linux (Fedora 27).
I added a line to ma.sh as mango would not start, as it was trying to connect to the x11 display.
$ grep JAVAOPTS *.sh
I connect to http://localhost:8080 and get the mango login screen, but cannot connect as admin/admin.
The log on the terminal screen shows
WARN 2018-02-04T17:43:39,781 (com.serotonin.m2m2.web.mvc.spring.security.MangoAuthenticationFailureHandler.saveExceptionImpl:81) - Failed login attempt on user 'admin' from IP +0:0:0:0:0:0:0:1
Any tips for next steps