1.1.0.0.2 Recommended
Prerequisites:
The following objectives were used as a basis when the certification exam
was developed. Some of these topics have been regrouped to provide better
organization when discussed in this publication.
- Use LED output to isolate boot failure problems, such as 223-229 and 551
- Access rootvg in maintenance mode using boot media to repair or restore
file system (fsck, missing files)
- Determine whether hang is resource versus OS hang
- Use crash LEDs to determine if crash is likely to be due to hardware or
software
- Examine errlog entries
- Answer questions from clients on how to create or remove drives
- Answer questions from clients on how to create/extend or remove paging
space
- Answer questions from clients on how to migrate data from one PV to
another
- Perform storage management activities (disk stripping, multiple JFS log
devices, and the like)
- Troubleshoot file system errors (identify missing file space, check
order of mounting, fsck, and so on)
- Troubleshoot disk error (after improper removal, identify missing
physical volume, synchlvodm, and other tasks)
- Answer questions from clients on how to add, delete and/or modify devices
- Answer questions from clients on how to configure network devices (SSA
loops, SCSI devices, modems, PPP communications, ttys, Async Controllers, and
so on)
- Troubleshoot problems related to configuring network devices
- Troubleshoot X-Windows error: unable to open display
- Troubleshoot print problems
- Troubleshoot performance problems based on system configuration
- Use vmstat command to identify CPU, RAM and paging bottlenecks
- Use iostat command to identify I/O bottlenecks
- Use netstat command to identify network bottlenecks
- Correct CPU, RAM, and paging shortages
- Correct network bottlenecks
- Optimize disk resources
- Troubleshoot when there is a problem communicating to other machines on the
network
- Troubleshoot hostname problems (for example not expected value)
- Troubleshoot when system is not forwarding packets
- Setup default route and routing strategy when network traffic is not
reaching destination
- Troubleshoot when interface has proper IP address but cannot ping
another host
- Check/set TCP tuning values for improved network performance
- Troubleshoot inability to Telnet or rlogin to machine
- Use different network troubleshooting commands to determine why client
cannot Telnet beyond default gateway
- Debug problems when trying to ping/telnet/rsh to other systems
- Add and remove interface (ifconfig, detach,
rmdev, and so forth)
- Analyze simple scripts to determine output
- Check critical system scripts and what they start/control (for example,
/etc/rc, /etc/rc.net, and importvg)
- Check for possible exposure in system access files (for example,
hosts.equiv, .rhosts, netrc, and forward)
- Check for suspect activity on system
- Add entries to crontab to run at specific times
- Check existence of cron and at job files
- Use flags for listing, editing and deleting crontabs (crontabl -1,
crontab -e, to name two)
- Set/change environment variables
- Use common vi manipulation subcommands to edit ksh script
- Use commands for viewing different file types (ascii = cat,
view, more pg: binary=strings, and so forth)
- Explain usage and limitation of various backup methods to the customer (for
example, backup, mksysb, tar, CPIO, and
remote backup)
- Verify backup is successful
- Troubleshoot backup failures
- Instruct customer on how to restore
- Answer questions from clients regarding when to use migrate and when to
preserve install
- Locate and analyze installp log files
- Navigate through smit menus to perform different installs
- Check and verify system installation integrity (lppchk,
lslpp, oslevel, and so forth)
- Check client definition and use debug tools (for example, boots
and iptrace)
- Initiate and capture nimboot debug (for example, createdevig boot image)
1.3 Certification
Education Courses