3.13.0-58.97) is not available, but a newer one is (3.13.0-166.216). We redirected you there.
/usr/bin/arm-linux-gnueabihf-as is in binutils-arm-linux-gnueabihf 2.24-2ubuntu3cross1.98.
This file is owned by root:root, with mode 0o755.
It is a symlink to /usr/bin/./usr/arm-linux-gnueabihf/bin/as