no v *buntu je arch u balicku sice uvedeno amd64, ale treba: $ uname -a Linux t420s 5.0.0-36-generic #39~18.04.1-Ubuntu SMP Tue Nov 12 11:09:50 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
$ arch x86_64
$ set | grep 64 HOSTTYPE=x86_64 MACHTYPE=x86_64-pc-linux-gnu