To use DB2, log on with a valid DB2 user ID that has the appropriate authority level for the commands you want to execute. If the sysadm_group parameter is defined in the database manager configuration file, the user performing administration tasks (such as cataloging) must belong to the System Administrative (SYSDAM) group.
The sysadm_group parameter is not set when DB2 is first installed; therefore, the following criteria are used to determine default SYSADM authority:
See Appendix G. Naming Rules for a list of naming restrictions.
As well as using the local operating system security to authenticate users, there is also the option of using DCE security. Refer to the Administration Guide for information on DCE security.