chown

I accidentally did run chown -R my_username /* instead of chown -R my_username ./*, so how do I undo this? Can I simply run chown -R root /* and then chown -R my_username /home/my_username? EDIT: The installation is pretty fresh. I installed this system couple of days ago and it doesn't have...

So the last few days I had lots of trouble trying to set up my host as a domain member with samba4, eventually I gave up and tried to run it as a standalone server. But even then, I would get "Permission denied" or "Access denied" both on my MacBook and Windows 10 PC. I have set up a ZFS...