AIX 5L Problem Determination - IBM Redbooks

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If the problem occurs on more than one machine, look for similarities and differences between the situations. 2.3 Collecting information about the system 2.4 Quiz The second step in problem determination is collecting information about the system. Some information will have already been obtained from the user during the process of defining the problem. The user is not the only source that can provide information regarding a problem. By using various commands, it is possible to determine how the machine is configured, the errors that are being produced, and the state of the operating system. The use of commands, such as lsdev, lspv, lsvg, lslpp, lsattr, df, mount, and others, enable you to gather information on how the system is configured. Other commands, such as errpt, can give you an indication of any errors being logged by the system. If the system administrator uses SMIT or Web-based System Manager to perform administrative tasks, examine the log files for these applications to look for recent configuration changes. The log files are, by default, contained in the home directory of the root user and, by default, are named /smit.log for SMIT and /websm.log for the Web-based System Manager. If you are looking for something specific based on the problem described by the user, then other files are often viewed or extracted so that they can be sent to your IBM support function for analysis, such as system dumps or checkstop files. The following assessment questions help verify your understanding of the topics discussed in this chapter. 1. A user complains that she is no longer able to get into the system. Which of the following procedures should be performed to determine the cause? A. Check the /etc/security/passwd file. B. Inform the user that she is not doing something right. C. Identify the steps the user is performing to access the system. D. Ignore the user’s definition and attempt to determine the problem from scratch. 10 IBM ^ Certification Study Guide - AIX 5L Problem Determination Tools and Techniques
2. A user explains that a problem was first noticed after a software update occurred. Which of the following procedures should the system administrator perform next to fix the updated software? A. Reboot the system. B. Add more memory to the system. C. Load a backup made prior to the update. D. Check for the prerequisites and updates of software applied. Chapter 2. Customer relations 11
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Figure 4-2 Format of the 103 code m
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4.5 Quiz The following assessment q
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4.5.1 Answers 4.6 Exercises The fol
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5.1 Configuring the dump device Pri
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5.2 Starting a system dump A user-i
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A command status screen will be dis
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If the system does not have a key s
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5.4 Increasing the size of the dump
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Setting output device to /dev/rmt0.
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Look at the time of the dump and th
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Failure Causes SOFTWARE PROGRAM Rec
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Using crash, you can examine: ► A
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► ? or help[] Lists all subcomman
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LR: .waitproc+d4 (0000edc4) 2ff3b38
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DSIRR Data Storage Interrupt Reason
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*prevthread:0xe6000000 *nextthread:
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In this example, the VMM return cod
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The snap command syntax is as follo
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Flag Description -t Format Lists ea
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Flag Description -p Device Temporar
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Figure 5-3 Error log case study 2.
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Figure 5-4 Case study Which of the
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5.10.1 Answers 5.11 Exercises The f
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6.1 The error daemon The error logg
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To change the current log file, the
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To process a report from the error
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Flag Description -g Displays the AS
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Flag Description -F FlagList Select
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Probable Causes ERRDEMON STARTED AU
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USER ID 0 0=SOFT IPL 1=HALT 2=TIME
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Flag Description -k ErrorID[,ErrorI
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6.5.1 Setting up an accounting syst
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Use the following message priority
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7.1 LVM data The Logical Volume Man
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AIX version level Verify that the v
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This example shows that the volume
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This error information displays the
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hdisk0 Available 30-58-00-8,0 16 Bi
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7.4 The AIX JFS 7.4.1 Creating a JF
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7.4.2 Increasing the file system si
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In many cases, restoration of the b
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lv02 jfs 2 2 1 open/syncd /u/testfs
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► Understanding enhanced journale
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512 bytes) to minimize internal fra
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Function JFS2 JFS Compression No Ye
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7.4.10 Disk quota Pseudo file name
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home: blocks in use: 0, limits (sof
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7.5.3 Reducing and removing paging
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Table 7-3 Commonly used flag of the
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7.6.4 The rmlvcopy command The rmlv
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Which of the following commands sho
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8.1 Network interface problems If h
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As you can see, the output shows th
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If you are using the route command
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address of the named server and try
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TOK: access control field = 0, fram
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the nfs_max_threads parameter of th
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Flags Description -s host Records p
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9.1 User license problems If it is
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telnet: connect: A remote host did
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user is limited and defined as an A
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9.4.3 A full file system uid=0(root
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your trace, the system may be traci
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113 0.004261661 0.001518 unlock: lo
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If the sendmail command encounters
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Action or function System V PowerPC
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Switching between subsystems The op
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Flag Description -s Subsystem Speci
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9.10 Quiz Flag Description -O Optio
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6. A user has the ability to ping t
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232 IBM ^ Certification Study Guide
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Figure 10-1 General performance tun
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Display previously captured data Th
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10.1.2 The vmstat command The vmsta
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later). The method used in AIX Vers
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second. Large values indicate a CPU
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kernel routine records the process
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syncd 1 2 2 0 0 0 sh 1 1 1 0 0 0 sl
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The memory columns The memory colum
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The sr column The sr column shows t
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If you want to sort to the sixth co
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► Workload Management Class (-W)
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schedtune limitations The schedtune
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schedtune parameters are reset by t
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tty: tin tout avg-cpu: % user % sys
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When looking for performance proble
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those that do not. If you are runni
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The netstat -m command The netstat
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spec buf 1 0 0 0 128 128 0 locking
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Late Collision Errors The Late Coll
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The retrans column displays the num
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Figure 10-3 Web-based System Manage
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Superclasses A superclass is a clas
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► Shared subclass: This subclass
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The sequence of attributes within a
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This manual assignment can be done
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This defines three levels of privil
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The class assignment is done by WLM
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Figure 10-8 shows the SMIT panel wh
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Figure 10-10 SMIT panel for rset re
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10.6.1 The dbx command The dbx comm
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Subcommand Description return Conti
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15) phxent_dd [5 entries] 16) kbddd
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► To install all filesets associa
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- A Web server The browser must be
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Figure 12-2 HTTP filesets If you ar
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- Remote computer Type the remote d
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Figure 12-4 Documentation Library S
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CISPR International Special Committ
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I/O Input/Output I 2 C Inter Integr
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OEM Original Equipment Manufacturer
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SPM System Performance Measurement
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phase1 figure 23 phase2 15, 24, 36
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pc.statd 189 daemons shdaemon 73 te
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host name resolution telnet login p
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System Resource Controller (SRC) 13
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IBM Certification Study Guide - AIX
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AIX 5L Problem Determination - IBM Redbooks

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