Using Sage 7.4 (compiled) on Ubuntu 16.04, x86_64. The above command tries to load database_gap-4.8.3, but hangs after the messages:
[database_gap-4.8.3] Installed small group database. [database_gap-4.8.3] Installed prim database. [database_gap-4.8.3] Installed trans database. [database_gap-4.8.3] Installed tomlib database.