restricted shell

[J Horacio MG <homega@ciberia.es>]

Hi,

I know of the existance of a restricted shell, though I'm not sure
whether this is what I'm after.

In time, I'll be moving away to another country, and I intend to leave
my home computer with the current users configured, ie. root (of
course), my sister, and I.  I'd also like to create a "guest" user with
some little (hence restricted) access.  Is rsh what I should be looking
for?

Also, I'll need to access the computer both as root and as normal user
remotely, via the inet, as I cannot give my sister root control (good
...!  it took me a lot to convince her to give up windozing, then
customize her account and installing some nice looking programs, etc...
sadly enough, mutt doesn't offer a flowers bouquet with each new mail,
so I had to give her XCMail ;-) );
is, in this case, ssh what I should be installing?

Thanks in advanced for your replies.

-- 
Horacio
homega@ciberia.es
Valencia - ESPAÑA