For security, change the passwords of the built-in accounts - admin and linuxadmin - on each switch. The default passwords of these two accounts are admin and linuxadmin respectively. You can use the admin account to log in to the OS10 CLI, the Linux shell, and the SFS UI. You can use the linuxadmin account to log in to the Linux shell.

To change the admin password:

1. Connect to the switch console.
2. Log in as admin.
3. Run the following commands:

   OS10# configure terminal
   
   OS10(config)# username admin password new-password role sysadmin
   OS10(config)# exit
   OS10# write memory

To change the linuxadmin password:

1. Connect to the switch console.
2. Log in as admin.
3. Run the following commands:

   OS10# configure terminal
   
   OS10(config)# system-user linuxadmin password new-password
   OS10(config)# exit
   OS10# write memory

Repeat the above steps on the remaining switches.

For additional security best practices, see the Dell SmartFabric OS10 and SmartFabric Services Security Best Practices Guide.