Kelvin Ng proclaimed:
>    I've created new a user account for login . This
> user acount basically to allow system administrator
> login from home via internet , to access company
> network devicess such as router,switch and server .

I hope you have disabled telned on the server and are using ssh to log
into the machine.  telnet is notoriously insecure to sniffing.

>    Since my linux box act as transit ,I wants to allow
> them to access those files or command within their
> home directory ; but restrict use those files or
> command located in /usr, /etc /bin and other user home
> directory . 

You might want to look into restricted shells.  man rbash for more
info.  There are a couple of other restricted shells available.

Thaths

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