1.  Yum Install Required Dependencies ::

   -- Note - names may change slightly between different OS versions, which can be determined by 'yum search package-name'

      postgresql
      postgresql-server
      unixODBC
      perl
      authd

      AND
      
      postgresql-odbc  (could also be postgresqlXX-odbc)
       - also needs to be installed, but this is not declared in the RPM due to issues with versioning resolution

2.  Start Postgres Server and Initialize Database Tables ::

      CentOS 5.x :: sudo /sbin/service postgresql start
      CentOS 6.x :: sudo /sbin/service postgresql initdb; sudo /sbin/service postgresql start
      SUSE11     :: sudo /usr/sbin/rcpostgresql start
      OpenSUSE12 :: sudo /usr/sbin/rcpostgresql start
      
3.  Modify authd config file for xinetd.d ::

      vim /etc/xinetd.d/auth

    Remove the '-E' command line argument for auth ::

      changing :
        [ server_args = -t60 --xerror --os -E ]
      to :
        [ server_args = -t60 --xerror --os ]

4.  Set the proper runlevel for authd ::

      sudo /sbin/chkconfig --level=3 auth on

5.  Restart xinetd

      sudo /etc/init.d/xinetd restart

6.  Open your firewall, if necessary, to let in iRODS ::

      Add the following to your /etc/sysconfig/iptables:

        -A INPUT -m state --state NEW -m tcp -p tcp --dport 1247 -j ACCEPT
        -A INPUT -m state --state NEW -m tcp -p tcp --dport 20000:20199 -j ACCEPT
        -A INPUT -m state --state NEW -m udp -p udp --dport 20000:20199 -j ACCEPT

      Restart the firewall:

        sudo service iptables restart

7.  Install the iRODS RPM ::

      rpm -i irods-XXX.rpm