/usr/share/binfmts/qemu-s390x is in qemu-user-static 2.0.0~rc1+dfsg-0ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | package qemu-user-static
interpreter /usr/bin/qemu-s390x-static
credentials yes
offset 0
magic \x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x16
mask \xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff
|