> 
> This should be an easy one....
> After my system boots, I can't make any modifications or add any files
> because I get the error message "Read-only file system".  Am I over
> looking something obvious?

Sounds like you're booting in single-user mode. Only / is mounted at
that point, and it's read only (so you can fsck it successfully).

mount /

should mount / read-write (as per the defaults in /etc/fstabs).

Take care,

Bill