Allow tab completion in rbash

Question

I have restricted user, whose default shell is rbash. Now, I would like to allow the TAB completion feature for this user for his/her home directory, instead of getting this error:

-rbash: /dev/null: restricted: cannot redirect output
-rbash: /dev/null: restricted: cannot redirect output
bash: _upvars: `-a2': invalid number specifier
-rbash: /dev/null: restricted: cannot redirect output
bash: _upvars: `-a0': invalid number specifier

How can I do this for restricted user?

Answer 1

Change permission of /dev/null to 666

chmod 777 /dev/null