For every virtual organization you are supporting you need to define users in the users.conf file. The standard location of the users.conf is /opt/glite/yaim/etc/users.conf. You can find an example of this file in the directory /opt/glite/yaim/examples/.
You can define several groups for a virtual organization but you have to provide at least two groups, one for all users and one for software managers (sgm accounts). The software manager have special rights to install software on the virtual organization software area and they are allowed to set VO tags.
The format looks like
10101:dech001:1307:dech:dech:: 10102:dech002:1307:dech:dech:: ... ... 10301:sgmdech1:1307,1308:dech,dechsgm:dech:sgm: 10302:sgmdech2:1307,1308:dech,dechsgm:dech:sgm:
For the GridKa School we use the virtual organization dech. You can download a ready-made users.conf file for this course:
wget http://gkswiki.fzk.de/images/5/53/Users.conf.txt -O /opt/glite/yaim/etc/users.conf
Related topics: groups.conf