AIX 5L Problem Determination - IBM Redbooks

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If the sendmail command encounters errors when trying to record statistics information, the command writes a message through the syslog subroutine. The sendmail command updates the information in the file each time it processes mail. The statistics kept in the /etc/mail/statistics file are in a database format that cannot be read as a text file. To display the mailer statistics, type the following at the command line: # /usr/sbin/mailstats This reads the information in the /etc/mail/statistics file, formats it, and writes it to standard output. 9.7 TTY troubleshooting The following sections discuss various common TTY problems and their solutions. The /usr/bin/tty [-s] command writes to standard output the full path name of your terminal. If your standard input is not a terminal and you do not specify the -s flag, you get the message Standard input is not a tty. This chapter discusses some common TTY errors, recovery procedures, and also general TTY management commands. 9.7.1 Respawning too rapidly errors The system records the number of getty processes spawned for a particular TTY in a short time period. If the number of getty processes spawned in this time frame exceeds five, then the Respawning Too Rapidly error is displayed on the console and the port is disabled by the system. The TTY stays disabled for about 19 minutes or until the system administrator enables the port again. At the end of 19 minutes, the system automatically enables the port, resulting in the spawning of a new getty process. Possible causes Possible causes are: ► Incorrect modem configuration ► A port is defined and enabled but no cable or device is attached to it ► Bad cabling or loose connection ► Noise on communication line ► Corruption of /etc/environment or /etc/inittab files 218 IBM ^ Certification Study Guide - AIX 5L Problem Determination Tools and Techniques
► TTY configuration is corrupted ► Hardware is defective Recovery procedures Recovery procedures are: ► Correct modem configuration as per your modem configuration documentation. ► Disable the TTY, remove the TTY definition, or attach a device to the port. To disable the TTY definition use the chdev command as follows: #chdev -l ttyName -a Login=disable After running this command, the TTY does not become enabled after a system restart. To remove the TTY definition, disable the TTY port using the pdisable command: #pdisable ttyName ► Check cabing and that the correct part number is being used. ► Eliminate noise on communication line. ► In the /etc/inittab file, examine the TTY devices line. If the TTY is set to off, it is likely that the TTY port is not being used. If not, remove it or add a device to the port. ► Remove the corrupted TTY configuration. ► Locate the defective hardware using diag. Refer to Table 9-1 for additional TTY commands. Table 9-1 Managing TTY devices Task SMIT fast path Command or file Web-based system manager management environment List defined tty devices. smit lsdtty lsdev -C -c tty -H Software -> Devices -> All Devices Add a tty. smit mktty mkdev -t tty Software -> Devices -> Overview and Tasks Chapter 9. System access and printer problem determination 219
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ibm.com/redbooks IBM Certification
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Note: Before using this information
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3.5.1 The /etc/inittab file . . . .
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7.2.1 Data relocation . . . . . . .
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9.9.1 The lslicense command . . . .
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x IBM ^ Certification Study Guide -
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10-12 Performance tuning flowchart
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8-7 Commonly used flags of the rout
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Trademarks The following terms are
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This publication does not replace p
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Comments welcome Your comments are
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1.1 Certification requirements To a
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e. Verify that file systems are mou
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Preparation for this exam is the to
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2.1 Defining the problem The first
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If the problem occurs on more than
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2.4.1 Answers The following are the
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3.1 A general overview of the boot
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mainly to components on the motherb
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Figure 3-3 Task selection menu in d
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3.2.2 PCI systems next step is to s
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3.3 Boot phase 1 Newer PCI architec
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3.4 Boot phase 2 In boot phase 2, t
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As mentioned, there are a lot of di
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3.4.3 LED 518 product documentation
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Figure 3-9 Boot phase 3 /etc/initta
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3.5.2 LED 553 3.5.3 LED c31 3.5.4 L
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3.5.5 pSeries servers A specific LE
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When the system is gracefully shut
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LED Reason/action c31 Define the co
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3. A file system is being mounted b
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3.9.1 Answers 3.10 Exercises The fo
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4.1 Hardware basics RS/6000 and pSe
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The most important fields in the pr
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Figure 4-1 Main diagnostics menu Th
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► Full testing requires that the
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3. Place the CD-ROM into the drive.
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Note: This service aid is only pres
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2. Select Change Show use of an SSA
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LED 299 A LED code of 299 shows tha
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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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The shconf command is invoked when
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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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To display a detailed report of all
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USER ID 0 0=SOFT IPL 1=HALT 2=TIME
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Resource Class: planar Resource Typ
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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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6.6 The syslogd daemon The syslogd
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Use the following message priority
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3. A system operator accidentally d
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6.7.1 Answers 6.8 Exercises The fol
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7.1 LVM data The Logical Volume Man
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7.2.1 Data relocation 7.2.2 Backup
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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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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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10.8 Command summary The following
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10.8.4 The nfsstat command 10.9 Qui
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6. Which command will show system c
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11.1 Overview 11.1.1 Terminology 11
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Note: Before installing a new set o
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► APAR number, such as IY00301. I
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► To install all filesets associa
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Table 11-2 Commonly used flags of t
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11.5 Quiz Flag Description -f Check
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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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Other resources These publications
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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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N name resolution diagnostic 185 pr
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ecent CPU usage 241 recovering an i
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System Resource Controller (SRC) 13
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