Hi..
0. Create a group projects
1. Creste three groups project1, project2,project3 under project group
2. Create the users in respective groups
3.Create Three folders project1, project2, project3 and change the group to peoject1, project2, project3. so that the respective groups can access the common folders
4. Create a group secrataries and make project group as a secondary group for this group
5. Create folder secratary and change the group to secratary and give the permission to the respecive groups
6. Use userconf or chmod to give the permission to access the userconf/useradd command for the respective project leaders
7. Give the Expire date other derails while creating the users
Hey some one give suggesstion if anything wrong
siddiqu.T