You can't really access the file system from the console. There are a few obscure ways to do it, but the way to do it is to run NW Admin. It is in the sys\public\win32 folder and is called nwadmin32.exe. You must have admin rights to make changes.
You can also run the java program, it is called console one. The latest version is available from Novell.
Personally, I like NW Admin, but it is a memory hog.
There are some nice third party utilities that will do what you want. Check out JRB Utilities.
By the way: You DO NOT want to give full access to the root of the sys volume. All a user needs is read and file scan. You should use or create another volume for the users to have. It is like giving them full rights to the Windows directory, they could completely destroy your OS. Plus it is a security issue, it could get you hacked.
JON