User`s guide

Troubleshooting 561

Recovering from root Authentication Failure

Use the following procedure if an attempt to login to the console as root

brings up the following message.

T To Recover from root Authentication Failure

1. Boot the OnSite in the single user mode.

See “To Boot in Single User Mode from U-Boot Monitor Mode” on page

571.

The root single user prompt appears as shown in the following

screen example.

2. Open the /etc/nsswitch.conf file for editing.

3. Search for the uncommented entries for the passwd, shadow and

group databases [whose lines do not start with the pound (#) sign].

Table 9-1: Tasks for Configuring Troubleshooting Connection Methods [OSD]

Connection

Method

Where Configuration is Documented

Internal modem • “Configuration>Serial/AUX>Aux/Modem Port” on page 257

• “To Configure the Internal Modem [Expert]” on page 267

External modem • “To Configure an AUX Port for PPP [Expert]” on page 266

Local User station • “To Configure Local User Sessions [Expert]” on page 221

1 FROM FOR root, User not known to the underlying

authentication module

[root@(none) /]#

[root@(none) /]# vi /etc/nsswitch.conf