Method 1

1. Login to your server via SSH.
2. Enter the below command to change the password.

3. $ v-change-user-password admin newpassword

4. Replace the newpassword field with the new password you want to set.

Method 2

1. Login to your server via SSH.
2. Enter command following command.

3. $ passwd admin

4. Enter new UNIX password:
5. Retype new UNIX password:
6. passwd: password updated successfully.