Where the ROMs are located was written in the posted link, path "Boot/Amiga"
I assume ".uaerc" is the UAE config file ?
I can't help you because I don't use Linux, in any case no Amiga emulator FS-UAE, UAE, E-UAE, are comparable to WinUAE.
FS-UAE, UAE, E-UAE, are based on older versions of WinUAE and lack some features, for AROS 68k it is advisable to use WinUAE.