Help Center > > User Guide> MRS Manager Operation Guide> Security Management> Changing the Password for the Kerberos Administrator

Changing the Password for the Kerberos Administrator

Updated at: Dec 31, 2019 GMT+08:00

Scenario

Periodically change the password for the Kerberos administrator kadmin of the MRS cluster to improve the system O&M security.

If the password is changed, the downloaded user credential will be unavailable. You need to download the authentication credential again, and replace the old credential with new one.

Prerequisites

A client has been prepared on the Master1 node.

Procedure

  1. Log in to the Master1 node.
  2. (Optional) If you want to change the password as user omm, run the following command to switch the user:

    sudo su - omm

  3. Run the following command to go to client directory /opt/client.

    cd /opt/client

  4. Run the following command to configure the environment variables:

    source bigdata_env

  5. Run the following command to change the password for kadmin/admin. The password change takes effect on all servers.

    kpasswd kadmin/admin

    For the MRS 1.8.5 or later cluster, the password complexity requirements are as follows:
    • The password must contain at least 8 characters.
    • The password must contain at least three types of the following: lowercase letters, uppercase letters, digits, spaces, and special characters which can only be ~`!?,.:;-_'(){}[]/<>@#$%^&*+|\=
    • The password cannot be the same as the username or reverse username.

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