Block mail service & kernel bit
Dear Friends ,
I have some follwing questions :
1) is it possible to restrict a service / service port against a user .
I want a situation where in my mail server , all user cannot use my mail service . I need to restrict user ... How can I do this . Here I mention that all user of my server locates in /home directory . I m using Linux RHEL 4 server .
2) I want to know the kernel bit , is it either 64 or 86 bit ? using which command I can get the result ? In the present time which kernel bit Linux is used ?
waiting for ur kind reply .. ..