Monday, November 19, 2007

Important and basic Windbg commands

!analyze –v :analyzes the dump file and provides a best possible diagnosis of the same

!sympath :shows path to your symbol files

lm :lists all loaded modules in memory

lmf :list loaded modules with full path

lmt :list loaded modules with last modified timestamp

!lmi <module name> :Shows header information about the module, including the date and time, which can often tell you whether you're running an older version of a program and need to upgrade

vertarget :Shows information about the system on which you are debugging

!peb :Shows the PEB (process environment block) including DLL information

.trap :Dump a trap frame

.chain :Lists all loaded debugger extensions

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Tags: Windows XP, Windows Server 2000, Windows Server 2003

Published Date: 20071109

Tuesday, November 13, 2007

i8042prt failed to load on boot

When you boot up your computer you get a message that atleast one service failed to start. On checking the eventlogs you figure out that i8042prt failed to load. You do not face this issue on all your computers but mostly on 'headless' servers.

You get the following error message in Windows event logs.

Event Type:                 Error
Event Source:              Service Control Manager
Event Category:           None
Event ID:                     7026
Date:                          11/13/2007
Time:                         9:51:01 AM
User:                          N/A
The following boot-start or system-start driver(s) failed to load: i8042prt

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Tags: Windows Server 2003

Published Date: 20071113

Monday, November 12, 2007

Finding NIC information remotely using WMIC commands

WMIC is a very useful and very under utilized interface for server / OS management provided in Windows. One very common example that generally requires logging in to the server is to check / set Network card properties. At a command prompt type WMIC and then /? to find the available interfaces that can be queried or set.

To check NIC Configuration tyep the following sequence of commands at the command prompt. For example:


NICCONFIG Get DNSDomainSuffixSearchOrder

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Tags: Windows XP, Windows Server 2000, Windows Server 2003

Published Date: 20071112