$dpkg --print-architecture amd64 $dpkg --print-foreign-architectures $dpkg --add-architecture i386 dpkg: error: unable to create new file '/var/lib/dpkg/arch-new': Permission denied $sudo dpkg --add-architecture i386 [sudo] password for jeffrin: $dpkg --print-foreign-architectures i386 $sudo dpkg --add-architecture itest386 $dpkg --print-foreign-architectures i386 itest386 $dpkg --remove-architecture itest386 dpkg: error: unable to create new file '/var/lib/dpkg/arch-new': Permission denied $sudo dpkg --remove-architecture itest386 $dpkg --print-foreign-architectures i386 $sudo dpkg --remove-architecture i386 $dpkg --print-foreign-architectures $