IBM SG24-5131-00 Manuale Utente

IBM Certification Study Guide  AIX HACMP

To add a user on one or more nodes in a cluster, you can either use the AIX 

mkuser

 command in a 

rsh

 to one clusternode after the other, or use the 

C-SPOC 

cl_mkuser

 command or the Add a User to the Cluster SMIT screen. 

The 

cl_mkuser

 command calls the AIX 

mkuser

 command to create the user 

account on each cluster node you specify. The 

cl_mkuser

 command creates a 

home directory for the new account on each cluster node. 

On AIX systems, you can change any of the attributes associated with an 
existing user account by using the 

chuser

 command. Using the 

chuser

 

command, you specify the name of the user account you want to change and 
then specify the attributes with their new values. If you use the SMIT Change 
User Attributes screen, the complete list of user attributes is displayed and 
you can supply new values for any attributes. The 

chuser

 command modifies 

the user information stored in the

 

/etc/passwd file and the files in the 

/etc/security directory. 

To change the attributes of a user account on one or more cluster nodes, you 
can either use the AIX 

chuser

 command in 

rsh

 to one cluster node after the 

other, or use the C-SPOC 

cl_chuser

 command or the C-SPOC Change User 

Attributes SMIT screen. The 

cl_chuser

 command executes the AIX 

chuser

 

command on each cluster node.

Both cluster nodes must be active and a user with the specified name must 
exist on both the nodes for the change operation to proceed. Optionally, you 
can specify that the 

cl_chuser

 command continue processing if the specified 

user name exists on any of the cluster nodes. See the 

cl_chuser

 command 

man page for more information.

On AIX systems, you remove a user account by using the 

rmuser

 command or 

the SMIT Remove a User From the System screen. Using the 

rmuser

 

command you specify the name of the user account you want to remove and 
specify whether you want the user password and other authentication 
information removed from the /etc/security/passwd file. 

Do not use the 

cl_chuser

 command if you have an NIS (Network 

Information Service) database installed on any node in your cluster.