/etc/resolvconf/resolv.conf.d/head is in resolvconf 1.79.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
|