/usr/lib/arm-none-eabi/bin/nm is in binutils-arm-none-eabi 2.26-4ubuntu1+8.
This file is owned by root:root, with mode 0o755.
It is a symlink to /usr/lib/arm-none-eabi/bin/./usr/bin/arm-none-eabi-nm
/usr/lib/arm-none-eabi/bin/./usr/bin/arm-none-eabi-nm