I have been experimenting with etckeeper to store different snapshots of /etc in a git repo.I have cloned a working /etc in /etc-1 of a clean VPS and I have restored metadata with etckeeper, the I have deleted /etc and I have made a symbolic link of /etc to /etc-1.I could not connect from ssh after reboot, so I logged in from the HN.Searching for broken symlinks I have found that /etc/dev/devices/ram and /etc/dev/devices/ramdisk have broken links to /dev/ram1 and /dev/ram0. And /dev/core has a broken symlink to /proc/kcore.I can create the ramdisks with :mknod -m 660 /dev/ram0 b 1 1chown root.disk /dev/ram0But when I reboot they disappear.What creates all those files? 
Missing /dev/ram0 /dev/ram1 and /proc/kcore
linux;centos;ramdisk