Get IP Address From Windows Command Line

I know many can and will say I can simply use ipconfig or ping the local computer name and to an extent that’s true. In my case I really only want the IP Address and nothing else, just the plain IP Address. I don’t want the extra verbiage that goes along with it.

To get started let’s run through a simple statement, but before we do know that this is geared towards a command prompt and not a batch. The syntax is slightly different.

Step 1: Get only one reply

ping %computername% -4 -n 1 | find /i "reply"

Step 2: Get all left of the colon

FOR /f "tokens=1 delims=:" %d IN ('ping %computername% -4 -n 1 ^| find /i "reply"') DO ECHO %d

Step 3: Get the IP Address

FOR /f "tokens=1 delims=:" %d IN ('ping %computername% -4 -n 1 ^| find /i "reply"') DO FOR /F "tokens=3 delims= " %g IN ("%d") DO echo %g

Step 4: Get the first octet


You might question why you would only want the first octet and the answer is simple. Based on that single value I can determine what the backup share is. So if I were to return only the first octet into a stored procedure then it can dynamically perform backups accordingly to the appropriate share.

FOR /F "tokens=1 delims=:" %d IN ('ping %computername% -4 -n 1 ^| find /i "reply"') DO FOR /F "tokens=3 delims= " %g IN ("%d") DO FOR /F "tokens=1 delims=." %h IN ("%g") DO ECHO %h

At this point you might be asking yourself what the syntax means. Well here is the scoop using (Step 2) as a reference point. Well consider tokens as segments of a single item that is separated by a specific value.

Let’s examine the following string:

Reply from 127.0.0.1: bytes=32 time<1ms TTL=128

Looks pretty straightforward for the most part but if you think about what the separating value that you’ll want to use then the string begins to appear differently. For example I want to set the delims otherwise known as the deliminator character to a colon. Well there is only one colon therefore making two tokens. All characters left and all character right of the colon.

So by me running (Step 2) I am essentially requesting all characters to the left of the colon, because I am only asking for token 1. If I specified token 2 then I would get all characters to the right of the colon including the leading space.

FOR /f "tokens=2 delims=:" %d IN ('ping %computername% -4 -n 1 ^| find /i "reply"') DO ECHO %d

Now moving onto (Step 3) I am essentially breaking apart the string into three tokens because I am setting the delims to a space which is represented by delims= “. There is a space between the = and the “.

Let’s examine the string:

Reply from 127.0.0.1

Hopefully at this point you are able to see the three tokens in the above string. So in order to return only the IP Address I only request token 3.

POP QUIZ

Q1. What would be the delims value for 127.0.0.1?
Q2. How many tokens will be as a result?
Q3. What token will I need to request to get the first octet?

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Installing SQL Server 2005 Express via Command Line

There are a few ways to install SQL Server 2005: 1) From the UI or 2) Command-Line. The UI installation is cool, but deploying via command-line is (in my opinion) better, faster and more importantly consistent depending if you have all parameters specified in a batch file. There are technically two command-line options: 1) Pure Command-Line or 2) Command-Line with answer file.

pure command line

@echo off
color 17
Title SQL Server 2005 Express Unattended Install . . .
setup.exe /qb INSTANCENAME=DEV ADDLOCAL=SQL_Engine,SQL_Data_Files,SQL_Replication SECURITYMODE=SQL SAPWD=StrongPasswordGoesHere DISABLENETWORKPROTOCOLS=0 

command line with answer file

@echo off
color 17
Title SQL Server 2005 Express Unattended Install . . .
setup.exe /qb /settings "AnswerFile.ini"

answer file contents

[options]
INSTANCENAME=DEV
ADDLOCAL=SQL_Engine,SQL_Data_Files,SQL_Replication 
SECURITYMODE=SQL 
SAPWD=StrongPasswordGoesHere
DISABLENETWORKPROTOCOLS=0 

In both of the above examples notice that I am not specifying installation paths, data file paths, etc… So for any parameter that I did not supply a value for will automatically use their default values for each option not implicitly set. I only needed the basic necessities listed for my subscriber deployments.

For more information about additional parameters visit: How to: Install SQL Server 2005 from the Command Prompt

Checking Permissions with Batch Process

There is no denying it… I am a die-hard command-line junkie. When deploying to new systems I have my batch file arsenal with me at all times strictly because it keeps my processes very procedural and standardized. There are times when I come into an environment where the systems have already been deployed. Which makes things a bit challenging especially when dealing with multiple profiles on a single machine. Because of the fact that most of my deployments require SQL Server Express I have batch files setup accordingly that specifies the needed firewall exceptions along with other added automated steps. Just to name a few.

When dealing with existing systems I try to make dual processes 1) when I have admin access and 2) when I don’t have admin access. This all depends on the logged-on user of course. So in order to preserve the natural order of life I do my best to not interfere with user’s settings because it tends to throw them off and generally upsets them. So I keep their environment pretty much intact. In order to maintain consistency I run my dual processes. Not ideal but it works. Of course there are instances where I absolutely require admin access, but for the little items that are merely file placement and such I get by with the separate process.

It sounds like a lot of work, but once you have your batch file laid out the rest is cake. The first thing I do is check to see if the user has elevated privileged. I find trying to query the registry works well in indicating your permission level.

reg query "HKU\S-1-5-19" >NUL
echo %errorlevel%

If I ran this under a user account that is in the Users or Power Users group then the errorlevel will return a value of one.

01.StandardUser

If ran using an account with admin privledges you will see a value of zero returned.

02.AdminUser

The next step is to define the process to execute once the permission level has been determined. This is easily directed with the goto statement. Let’s take a look.

@echo off
color 17
reg query "HKU\S-1-5-19" >NUL
CLS
If Not %errorlevel% == 0 goto UserDeploy
If %errorlevel% == 0 goto AdminDeploy

:UserDeploy
::Run this process
goto end

:AdminDeploy
::Run this process
goto end

:end

I added the CLS on line two to clear the “Error: Access is denied.” message that is displayed on the first screenshot.

CLS

In terms of the dual processes I setup self-extracting zips to deploy to certain directories based on privileges.