A great many functions in os10 under preferences etc. are handled under the hood by utilities one can also access in terminal. Diskutility is the one that would appear to be the one the mac uses for repair permmissions and disk repair.

Here is the command in terminal to repair permissions:

sudo diskutil repairpermissions

The sudo is to allow access to some functions and will prompt for one's password to proceed.

Do a:

man diskutility > textfile

This will capture the man help page for this utility to a textfile of your choice, it is large as these things go. Look for this option:

repairVolume

That would appear to do the 2nd of what you want. I have only used the repair permissions so read the man page for the 2nd option. Also a google for:

os10 diskutility repairVolume

Will get more often then not a discussion of the experience of others using the diskutility and the given option.


HTH.  XB

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