Naming and Directory Services (DNS, NIS, and LDAP)

Modifying Maps Made From Standard InputIf you later need to modify the map, you can use makedbm to disassemble the mapand create a temporary text intermediate file. To disassemble the map and create atemporary file, type the following.% cd /var/yp% makedbm -u homedomain/mymap > mymap.tempThe resulting temporary file mymap.temp has one entry per line. You can edit this fileas needed, using any text editor.To update the map, give the name of the modified temporary file to makedbm bytyping the following.% makedbm mymap.temp homedomain/mymap% rm mymap.tempThen propagate the map to the slave servers, by becoming root and typing thefollowing.# yppush mymapThe preceding paragraphs explained how to use makedbm to create maps; however,almost everything you actually have to do can be done by ypinit and Makefileunless you add nondefault maps to the database or change the set of NIS servers afterthe system is already up and running.Whether you use the Makefile in /var/yp or some other procedure the goal is thesame. Anew pair of well-formed dbm files must end up in the maps directory on themaster server.Adding a Slave ServerAfter NIS is running, you might need to create an NIS slave server that you did notinclude in the initial list given to ypinit.To add an NIS slave server:▼How to Add a Slave Server1. On the master server, become superuser or assume an equivalent role.Roles contain authorizations and privileged commands. For more informationabout roles, see “Using Role-Based Access Control (Tasks)” in System AdministrationGuide: Security Services.108 System Administration Guide: Naming and Directory Services (DNS, NIS, and LDAP) • January 2005