Avaya R3.0 Operating System Recovery, Hardware/software problems, Root password, Chapter contents

Page 27

Chapter 5: Operating System Recovery

Chapter contents

This chapter describes how to recover from problems with the Red Hat Enterprise Linux Server Edition 3.0 operating system. The topics included in this section are:

●Hardware/software problems

●Booting into single-user mode

●Booting into emergency mode

Hardware/software problems

This category can result from a variety of issue. Examples of this type of problem include:

●failing hard drives, or

●specifying an invalid root device or kernel in the boot loader configuration file.

If these problems occur, you may not be able to reboot the Red Hat Enterprise Linux. You can use one of the system recovery modes to try and resolve the problem, or, get copies of the most important files.

Root password

If you forget your root password, do the following:

1.Boot into rescue mode or single-user mode. See Booting into rescue mode.

2.Use the passwd command to reset the root password.

Issue 6 August 2005 27

Image 27

Contents 19-300174 Issue 6 August Secure Services Gateway SSGMaintenance Guide in support of the Secure Access and Control Offer SAC R3.0Email totalware@gwsmail.com 2005 Avaya Inc. All Rights ReservedChapter 3 Server Initialization and Shutdown Chapter 1 Maintenance OverviewChapter 2 Hardware Upgrade and Maintenance Chapter 5 Operating System Recovery4 Secure Services Gateway SSG Maintenance Guide Chapter 6 SSG Configuration Backup and RestoreIndex ContentsOverview Related resources Linux operating system manuals Chapter 1 Maintenance OverviewChapter contents OverviewDocument Title ContentRelated resources Table 1 Related Resources2 of Table 1 Related Resources continued3. Under the column Support Resources, go to Documentation Linux operating system manualsIn this chapter Chapter 2 Hardware Upgrade and MaintenanceInstallation guidelines Installation guidelines Removing the cover of the x305 IBM serverHandling static sensitive devices System reliability guidelinesGeneral safety guidelines Replacing the hard drive Replacing the hard drive in an x305 IBM serverReplacing the hard drive in an x306 IBM server 4 Replace the hard drive. x305 see Replacing the hard drive in an Tasks to replace the hard driveTask DescriptionRemoving the cover of the x305 IBM server 3. Installing the new hard drive in the x305 IBM serverRead General safety guidelines and Handling static sensitive devices Replacing the hard drive in an x305 IBM serverFigure 1 Captive screws on cover Figure 2 Removing and replacing the drive cage Removing the hard drive from the x305 IBM serverReplacing the cover of the x305 IBM server Installing the new hard drive in the x305 IBM serverRemoving the hard drive from the x306 IBM server 2. Installing the new hard drive in the x306 IBM serverFigure 3 Removing and installing the hard drive Replacing the hard drive in an x306 IBM serverReplacing the x305 IBM server’s RSA Installing the new hard drive in the x306 IBM server20 Secure Services Gateway SSG Maintenance Guide Replacing the server’s dual NICChapter 3 Server Initialization and Shutdown Server initializationServer initialization System shutdown System shutdown Gathering system information Monitoring system processes Chapter 4 Operating System MonitoringGathering system information Monitoring system processesMemory usage Table 3 Interactive Commands Command DescriptionFile systems Virtual memorySpace used by files in a directory Additional resources Hardware/software problems Booting into single-user mode Chapter 5 Operating System RecoveryHardware/software problems Root passwordlinux rescue Booting into rescue modefdisk -l one sh-2.05b#chroot /mnt/sysimage mount -t ext3 /dev/hda5 /fooBooting into single-user mode Booting into emergency mode 32 Secure Services Gateway SSG Maintenance Guide Chapter 6 SSG Configuration Backup and Restore Backing up the SSG configurationBacking up the SSG configuration Restoring the SSG configuration Figure 4 Edit Backup Scheduler Configuration Page SSG Configuration Backup and Restore34 Secure Services Gateway SSG Maintenance Guide 6. Click Save Changes c. tar zfx ~/SSG-Product Id-Date-Time.tgz Restoring the SSG configurationpgrestore -v -p 6543 -d avssgdb -a -Ft --no-owner dbdumpfilename.tar a. mkdir tempdir b. cd tempdirIndex Index38 Secure Services Gateway SSG Maintenance Guide