Root user of the system (Ubuntu terminal) is tacgui/tacgui
MySQL root and tgui_user passwords you can find inside of
/opt/tacacsgui/web/api/config.php
For the security reasons I recommend to change all default users!
Install from ISO, while installation set correct static IP (if you don’t use DHCP) with Internet access. After Installation use credentials tacgui/tacgui and execute command sudo /home/tacgui/tgui_install/tacacsgui.sh silent
. And full installation will completed in few minutes, without any questions.