Scenario
This section describes how to periodically change the login passwords of the OS users omm, ommdba, and root on MRS cluster nodes to improve the system O&M security.
Passwords of users omm, ommdba, and root on each node can be different.
Procedure
- Log in to the Master1 node and then log in to other nodes whose OS user passwords need to be changed.
- Run the following command to switch to user root:
sudo su - root
- Run the following command to change the passwords of users omm, ommdba, or root:
passwd omm
passwd ommdba
passwd root
For example, if you run the omm:passwd command, the system displays the following information:
Changing password for user omm. New password:
Enter a new password. The password change policies for an OS vary according to the OS that is used.
Retype new password: passwd: all authentication tokens updated successfully.
The default password complexity requirements of the MRS cluster are as follows:
- The password must contain at least eight characters.
- The password must contain at least three types of the following: uppercase letters, lowercase letters, digits, spaces, and special characters ('~!@#$%^&*()-_=+\|[{}];:'",<.>/?).
- The new password cannot be the same as last five historical passwords.