1. Fetch the yum repo for either SL5 or SL6.
2. Put the appropriate repo into the /etc/yum.repos.d/ directory.
3. Edit the appropriate repo with any text editor.
4. Add the line (end of file)

   priority=25

5. Install Yum priorities

   yum install yum-priorities

6. Install the the various xrootd rpms's

   yum install xrootd-libs.x86_64 xrootd-server.x86_64 xrootd-client.x86_64 xrootd-fuse.x86_64 xrootd-debuginfo.x86_64

7. Create a data directory to be mounted, such as

   mkdir /dataxrd

8. Change ownership of mount point

   chown xrootd:xrootd /dataxrd

9. Create the xrootd data area:

   mkdir /dataxrd/atlas

10. Change the ownership of the xrootd data area

    chown xrootd:xrootd /dataxrd/atlas

11. Run the service command to setup xootd

    /sbin/service xrootd setup

12. Copy the xrootd configuration file and auth file over from atlas50

    scp root@atlas50:/etc/xrootd/xrootd-clustered.cfg  /etc/xrootd/xrootd-clustered.cfg
    scp root@atlas50:/etc/xrootd/auth_file  /etc/xrootd/auth_file

13. Look inside of xrootd-clustered.cfg to see that the following lines exists:

    # change to follow your local convention if different
    set localroot = /dataxrd
    oss.localroot $(localroot)

14. Open the xrootd port in the iptables 1094 (In /etc/sysconfig/iptables)

    -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 1094 -j ACCEPT

15. Restart iptables

    service iptables restart

16. Startup Xrootd on the machine

    /sbin/service xrootd start
    /sbin/service cmsd start

17. Remember that the log files are located here:

    /var/log/xrootd/xrootd.log
    /var/log/xrootd/cmsd.log

To test that the redirector sees the machine you just set up. It must be done on a machine with xrootd client libs installed.

1. Test that the machine works. You should see its ip address

   xrd <this machine> locateall /atlas

2. Find out if you can see this machine from the redirector

   xrd atlashn1 locateall /atlas

xrdcp test.txt  xroot://aschead01.hep.anl.gov:1094//atlas/chakanau/test/text.txt

Remove the directory:

rmdir xroot://aschead01.hep.anl.gov:1094//atlas/chakanau/test