How do I tell whether my cygwin installation is 32 or 64 bit? I don\'t remember which setup.exe to download. And I would hate to mess up my cygwin installation.
Run uname -m. If your cygwin install is 64-bit, the output will be x86_64. If it's 32-bit, you will instead see i386, i486, i586, or i686.
uname -m
x86_64
i386
i486
i586
i686