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Receiving error SQL30082N reason code 42 when attaching to an instance.

Technote (troubleshooting)


After I created several new instances on DB2 as user root, I want to attach to one of the instances using an ID that is not an instance owner. However when I try to do this, I get the following error:

systest1@local1:~> db2 attach to inst1 user testuser1
Enter current password for testuser1:
SQL30082N Security processing failed with reason "42" ("ROOT CAPABILITY REQUIRED"). SQLSTATE=08001


This error is usually seen when we are dealing with a non-root DB2 installation. There are some
important limitations when you use non-root DB2 installations. Please check the links at the end of this tech document for details.

SQL30082N Security processing failed with reason reason-code (reason-string).

An error occurred during security processing. The cause of the security error is described by the reason-code and corresponding reason-string value.

Here are some details regarding the reason code you are facing:

Authentication using local client or server passwords is not currently enabled.

User response:
Ensure that the proper userid and/or password is supplied.

The userid may be disabled, the userid may be restricted to accessing specific workstations, or the userid may be restricted to certain hours of operation.

To enable local client or server authentication for non-root installations, the system administrator must run the db2rfe script. Alternatively, authentication can be done using a security plugin.

In order to solve this problem it recommend that you run the db2rfe command, which enables the supported root features, in non-root installations of DB2.

Resolving the problem

1.) Stop the DB2 instance by issuing the "db2stop" command.
2.) Log in as root and locate your db2rfe.cfg found in DB2DIR/instance.
3.) Check the file to make sure it has:


4.) If it doesn't, then update it to match the above. Then run:

db2rfe -f <config_file>

If that doesn't help, then you need to check the permission's on db2ckpw and db2chpw. Do the following:

1.) cd to sqllib/security
2.) run: ls -l
3.) Check the permission's on the db2chpw and db2ckpw they should be:

-r-s--x--x 1 root inst1 51195 Dec 1 15:33 db2chpw
-r-s--x--x 1 root inst1 3534773 Dec 1 15:33 db2ckpw

4.) Also check to see if they are owned by root.
5.) If not owned by root, log in as root and run:

db2iupdt -k <instance>

and then check if db2ckpw is now owned by root.

6.) If you need to change the permission's of those files run the following commands (this needs to be done as root, since the files are owned by root):

chmod 4511 db2chpw
chmod 4511 db2ckpw

Stop and restart the instance.

7.) Also check with your System Administrator Team and make sure your file systems are not mounted with the NOSUID option. If they are, re-mount them without NOSUID.

The below links have additional information about SQL30082N, Non-root install and db2rfe:


Limitations of non-root installations

db2rfe - Enable root features for non-root install command

Document information

More support for: DB2 for Linux, UNIX and Windows
Performance - General/Tuning

Software version: 9.1, 9.5, 9.7

Operating system(s): AIX, HP-UX, Linux, Solaris

Software edition: Enterprise Server, Workgroup Server

Reference #: 1428687

Modified date: 18 November 2015