A) vi /etc/default/logincomment the line of /dev/consoleb)vi .rhostsenter the hostname by which the only user can connect with your system....bt no one else.....c) disable the ftp for the selected users in /etc/ftpusers file ...
Unix is having 3 ways of Security Mechanism:1. By granting or revoking File permissions. Owner or Admin can change permissions to be given to group or others by using chmod command in Unix.2. Login is...