Porting the auxiliary programs is a problem. Kurt Hornik has succeeded in getting most of them to work with some modifications to the source code. Detailed instructions can be found in the file hornik.txt in the subdirectory linux (under fastlink).
Valerio Aimale has packaged up executables and made them available by FTP.
ftp svpop.com.dist.unige.itcd pub/Linux/apps/genetics/linkage get i386_linkage.tar.gz for i386 Linux boxes i486_linkage.tar.gz for i486 Linux boxes