Well, it works well!
For those who use a Macintosh(and I am one) this is "part of" Disk First Aid being built in.
The steps follow:
sudo ShutDown Now Hit return
Enter password
You are "sudo...
Once in a while, I would think it advisable to run fsck -y to check the disk.
Should I sign in as su or sudo?
What is the difference and which is preferred?