Ubuntu How To: Setup Telnet,SSH & FTP service

Open terminal & become root(#) :  sudo -i 

For Telnet :

             1.  Install the package telnetd
 
                        # apt-get install telnetd

             2.  Now check telnet is running or not

                       # nmap localhost

                 The output must consist ' 23 Telnet ' .By default telnet service runs on 
                 23 port number.
                
                 If nmap is not installed , install nmap     
                  
                       # apt-get install nmap
      
             3. For starting or stoping the telnet service

                  # /etc/init.d/openbsd-inetd {start|stop|status}
                                  or
                  # service openbsd-inetd {start|stop|status}

For Ssh :

           For security reasons telnet service is not very much use. So it is  recommended to use ssh . By default ssh service runs on ubuntu if not then
      
           1. Install ssh
      
               # apt-get install ssh

           2.  Check ssh service runs or not

                      # nmap localhost

                The output must consist " 22 SSH" . By deafult ssh runs on 22 port
                number.
          
          3. For starting or stoping the ssh service
            
               #/etc/init.d/ssh {start|stop|status}
                         or
               # service ssh {start|stop|status}

For Ftp :

         1. Install package vsftpd
     
                # apt-get install vsftpd
       
        2.  Check ftp service runs or not

     
                 # nmap localhost

             The output must consist " 21 FTP" . By deafult ftp runs on 21 port
             number.

        3. For starting or stoping the ftp service
         
               #/etc/init.d/vsftpd {start|stop|status}
                         or
               # service vsftpd {start|stop|status}