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Tips & Tricks : CMD Batch parameters

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Handful list of parameters possible to use in CMD scripts:

%~I         - expands %I removing any surrounding quotes ("")
%~fI        - expands %I to a fully qualified path name
%~dI        - expands %I to a drive letter only
%~pI        - expands %I to a path only
%~nI        - expands %I to a file name only
%~xI        - expands %I to a file extension only
%~sI        - expanded path contains short names only
%~aI        - expands %I to file attributes of file
%~tI        - expands %I to date/time of file
%~zI        - expands %I to size of file
%~$PATH:I   - searches the directories listed in the PATH
environment variable and expands %I to the
fully qualified name of the first one found.
If the environment variable name is not
defined or the file is not found by the
search, then this modifier expands to the
empty string

%~1         - expands %1 removing any surrounding quotes (")
%~f1        - expands %1 to a fully qualified path name
%~d1        - expands %1 to a drive letter only
%~p1        - expands %1 to a path only
%~n1        - expands %1 to a file name only
%~x1        - expands %1 to a file extension only
%~s1        - expanded path contains short names only
%~a1        - expands %1 to file attributes
%~t1        - expands %1 to date/time of file
%~z1        - expands %1 to size of file
%~$PATH:1   - searches the directories listed in the PATH
environment variable and expands %1 to the fully
qualified name of the first one found.  If the
environment variable name is not defined or the
file is not found by the search, then this
modifier expands to the empty string

%~dp1       - expands %1 to a drive letter and path only
%~nx1       - expands %1 to a file name and extension only
%~dp$PATH:1 - searches the directories listed in the PATH
environment variable for %1 and expands to the
drive letter and path of the first one found.
%~ftza1     - expands %1 to a DIR like output line

Very useful for automated software installations for example.

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Code snippets : Downloading file from URL in PowerShell

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To download file from URL I used following piece of code:

$fileURL = "http://server/file.zip"
$fileName = "C:\Downloads\file.zip"
$webclient = New-Object System.Net.WebClient
$webclient.DownloadFile($fileURL,$fileName)
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Code snippets : Windows : Clear Event Logs

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From script repository I did use in the past, VBscript which allows to clear EvenLog on Windows machine. I did use that on computers with Windows XP and Windows Server 2003. however, this script will work also on Windows 7 and Windows server 2008.

By default script clears EventLog on computer where script is executed. To clear logs on remote machine just modify variable strComputer and replace dot with name of the target machine.

Script will read all EvenLog files from machine and will go through them removing all events.

And here is script itself :

strComputer = "."
Set objWMIService = GetObject("winmgmts:" _
& "{impersonationLevel=impersonate, (Backup, Security)}!\\" _
& strComputer & "\root\cimv2")
Set colLogFiles = objWMIService.ExecQuery _
("Select * from Win32_NTEventLogFile")
For each objLogfile in colLogFiles
objLogFile.ClearEventLog()
Next
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Code snippets : SQL : Backup and FTP Database

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When browsing repository of all scripts I did use in past, I found one which might be interesting. What this script does is:

  • Backups database to disk (name of database stored in @dbname, patch for backup stored in @archive_path, name of backup fine stored in @fname)
  • Compresses database backup using WinRAR (full command where to find WinRAR and how ot use it stored in @archive_cmd)
  • Generates set of commands for FTP client (series of xp_cmdshell commands redirecting output to F:\Backup\ftpcmds)
  • Uploads compressed backup to FTP server using command prompt FTP client command

I had that as small procedure executed automatically with SQL Server Agent. Script is for Microsoft SQL Server and I was running it on SQL Server 2000 and 2005. Here is code for that small procedure:

 

DECLARE @fname varchar(255)
DECLARE @fname_backup varchar(255)
DECLARE @fname_archive varchar(255)
DECLARE @archive_path varchar(255)
DECLARE @dbname varchar(255)
DECLARE @archive_cmd varchar(255)
DECLARE @put_cmd varchar(255)

SET @dbname = 'dbApplication'
SET @fname = @dbname + '_' + LTRIM(STR(DAY(GETDATE())))  + '.' + LTRIM(STR(MONTH(GETDATE()))) + '.' + LTRIM(STR(YEAR(GETDATE())))
SET @archive_path = 'F:\Backup\'
SET @fname_backup = @archive_path + @fname + '.BAK'
SET @fname_archive = @archive_path + @fname + '.RAR'
SET @archive_cmd = '"C:\Program Files\WinRAR\WinRAR.EXE" a ' + @fname_archive + ' ' + @fname_backup
SET @put_cmd = 'echo put ' + @fname_archive + '>> F:\Backup\ftpcmds'

PRINT @fname_backup
PRINT @fname_archive

BACKUP DATABASE @dbname TO DISK = @fname_backup WITH INIT

EXEC xp_cmdshell @archive_cmd
EXEC xp_cmdshell 'echo open 192.168.10.101> F:\Backup\ftpcmds'
EXEC xp_cmdshell 'echo user dbupload>> F:\Backup\ftpcmds'
EXEC xp_cmdshell 'echo password123>> F:\Backup\ftpcmds'
EXEC xp_cmdshell 'echo cd DB_Backup>> F:\Backup\ftpcmds'
EXEC xp_cmdshell 'echo bin>> F:\Backup\ftpcmds'
EXEC xp_cmdshell 'echo ha>> F:\Backup\ftpcmds'
EXEC xp_cmdshell @put_cmd
EXEC xp_cmdshell 'echo bye>> F:\Backup\ftpcmds'
EXEC xp_cmdshell 'ftp -d -i -n -s:F:\BACKUP\ftpcmds'

I hope that will be handy for someone to automate databsae backups and transfers.

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Tips&Tricks : How to skip Autologon in Windows XP

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As I had to fight with WIndows XP Autologon (we have it on many computers which are used for example for CCTV), I think can write down one more quick tips how to skip Autologon feature and use different account to access computer (for example to install Windows Updates).

So, situation I was dealing with was computer with Windows XP, connected to Active Directory domain with Autologn feature enabled. After computer started I’ve seen welcome dialog and after pressed ctrl-alt-del autologn procedure kick in and login to computer with restricted account. How to skip autologon process and be able to enter different username and password?

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Windows Registry : Autologon in Windows XP

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Again one of those things which I forget when is needed. Autologon in Windows XP. Funny enough is the fact that each time I’m looking for this information is when I want to prevent Windows XP from auto logon and trying to disable that in registry using remote access from Registry Editor.

Fortunately Microsoft prepared full detailed description, so now I can write down in my scratchpad for future reference instead of using Google each time I need that 😀

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