(this step is skipped for the i386_nt40 system type):
alpha_dux40/
+ alpha_dux50/ (only tested on 5.0A)
i386_linux22/
+ i386_linux24/ (only tested with 2.4.0 kernel)
rs_aix42/
+ sgi_65/ (file server not tested)
sun4x_56/
sun4x_57/
+ sun4x_58/
Example:
% mkdir i386_linux22