The error looks something like this:
“Failed to set up mount namespacing: Permission denied”
The fix:
Boot into single-user mode, or set enforcing=0 on the linux command line, then:
mkdir /mnt/tmp mount -obind / /mnt/tmp cp /proc/filesystems /mnt/tmp/proc cp /proc/mounts /mnt/tmp/proc/ mkdir -p /mnt/tmp/sys/fs/selinux mount -t selinuxfs selinuxfs /mnt/tmp/sys/fs/selinux chroot /mnt/tmp restorecon -v /* exit umount /mnt/tmp/sys/fs/selinux rm /mnt/tmp/proc/* rm -rf /mnt/tmp/sys/* reboot