HP-UX troubleshooting

Special note

New 5 day version!

Audience

Experienced HP-UX system administrators

Prerequisites

• HP-UX system and network administration I (H3064S) and HP-UX system and network administration II (H3065S) or
• HP-UX System and network administration for experienced UNIX® system administrators (H5875S) or
• Equivalent experience
• The course includes nPar and vPar troubleshooting, so attendance of HP-UX Partition Management (U5075S or HG770S) is recommended

Ways to save

Benefits to you

• Learn the techniques needed to recover your "dead" system
• Understand file system check and recovery options to restore lost data
• Anticipate problems and minimize network downtime by using basic diagnostics tools
• Ensure your network is operating properly by checking NFS and DNS functionality
• Keep your system current by managing software patches

Course Objectives

• Use the Management Processor for troubleshooting
• Troubleshoot EFI problems
• Recover a non-bootable HP Integrity system or partition
• Recover a non-bootable HP 9000 system or partition
• Work through file system recovery options
• Troubleshoot an 11i v3 kernel
• Troubleshoot a kernel crash dump
• Troubleshoot process problems
• Troubleshoot patch problems
• Troubleshoot storage problems
• Troubleshoot network, NFS, and DNS problems

Next Steps

• HP-UX Logical Volume Manager (H6285S)
• Inside HP-UX (H5081S)
• HP-UX Performance and Tuning (H4262S)
• HP-UX Partition Management (U5075S or HG770S)

Course outline

Troubleshooting Resources

• Manuals, web sites, and newsgroups
• Log files
• Key configuration files
• System Fault Management and EVWEB

Troubleshooting with the Management Processor

• Describe the main functions of the Management Processor
• Understand the features of iLO2 SMASH
• Use the virtual front panel to determine partition status
• Display configuration information and various complex component statuses
• Use the MP console log and system log to diagnose problems

Troubleshooting EFI and BCH

• Explain the impact of Partitioning on the pre-boot environment
• Use EFI commands to manage boot media
• Use the EFI ftp client to recover missing boot loader

Troubleshooting HP Integrity System Boot

• Describe the structures on an HP Integrity LVM boot disk
• Recover from potential boot failures (boot from alternate disk, kernel, single-user mode, LVM maintenance, tunable maintenance)
• Troubleshoot vPar boot issues
• Boot the HP-UX recovery shell from media and Ignite server
• Boot the Offline Diagnostic Executive from the HPSP and Diagnostics CD

Troubleshooting HP 9000 System Boot

• Describe HP9000 system startup
• Describe the HP9000 boot disk structure
• Describe potential HP9000 boot failures
• Recognise the differences between HP9000 and HP Integrity vPars
• Use the recovery shell to recover from boot issues

Troubleshooting File Systems

• State the purpose and describe the functionality of fsck
• Perform a log replay and full fsck on a VxFS file system
• Use fsadm to defragment a VxFS file system
• Use fsdb to view file system information

Troubleshooting the Kernel

• Describe the major steps in

  Troubleshooting the kernel

• View kernel changes via SMH and kclog
• Use kernel alarms to monitor kernel tunables
• Boot from an alternate kernel
• Boot to tunable maintenance mode
• Use boot-time overrides for kernel tunable values
• Configure dump devices
• Understand the basics of kernel debugging

Troubleshooting Process Problems

• Define a process
• Display a user’s process hierarchy
• Use the kill command
• Identify and clear zombie processes
• Troubleshoot CPU-intensive processes
• Manage user space application core files using coreadm

Troubleshooting Patch Problems

• Explain patch management strategies
• Manage HP-UX patches
• Describe the patch rollback procedure
• Use the cleanup, show_patches and check_patches commands
• Use the Software Assistant to manage patches
• Recover from a corrupt Installed Products Database
• Use the SD-UX logfiles to troubleshoot patch problems

Troubleshooting Storage

• Use HP-UX 11i hardware addresses to understand storage connectivity
• Use HP-UX 11i storage-related commands to troubleshoot storage issues

Troubleshooting Network Problems: Part I

• Relate the OSI 7-Layer Model to network addressing, display, and test command output
• Identify and resolve LAN card configuration problems
• Identify and resolve subnetting problems
• Identify and resolve routing problems
• Perform a network trace using Wireshark
• Display and modify tunable network parameters with ndd

Troubleshooting Network Problems: Part II

• Recognize the major differences between NFS v3 and NFS v4
• Resolve common NFS issues
• Explain DNS server configuration files and setup issues