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14 Windows Command Line Tricks

| Monday, August 27, 2012
Save A List of Files to a Text File by Extension

dir *.ext /s /b > files.txt

This command line will create a file called files.txt. When you open this file, there will be a complete list of all the files in that directory and all subdirectories with the .ext extension. You can then open up this text file in any text editor and work this the information.By changing the ext part, you can select different files. For example, if you wanted to list all of the PDF documents, you would type:

dir *.pdf /s /b > files.txt

Get Your IP Address Information

ipconfig /all

This will retrieve a pile of information about your network connection and IP information. From this command, you can get:
Host Name
Primary DNS Suffix
Node Type
IP Routing Enabled
WINS Proxy Enabled
DNS Suffix Search List
Connection-specific DNS Suffix
Network Adapter Description
Physical (MAC) Address
DHCP Enabled
IP Address
Subnet Mask
Default Gateway
DNS Servers

Get Installed Driver Information


It can be very useful when troubleshooting to know what drivers are installed on a system. This command will give you a complete listing of the drivers and when they were installed.

Copy Files Via Infrared Port

irftp filename.ext

This will fire up the Wireless Link dialog so that you can copy the specified file via an infrared port.

Find Files Opened By Network Users

openfiles /query

If you are running a system and you want to know who has files open on your computer, this command will provide you a list of those users and the files that they have open.

Note: If you get an error saying The system global flag ‘maintain objects list’ needs to be enabled to see local opened files, you can fix this issue by typing openfiles /local on. You will have to reboot the system but it will resolve the issue.

Monitor Port Activity

netstat -a 30

This will show you all of the TCP/IP ports that are being used on your system and what they are connecting to (or being connected from). It will continue to monitor these ports and refresh the information every 30 seconds. You can change the refresh rate by changing the number at the end of the command.

Recover Information From A Corrupt File

recover filename.ext

If you have a disk with damaged sectors, you can attempt to recover as much information as possible from the damaged file. Data that is not damaged can be retrieved but data in damaged sectors will be lost.

Defragment Remote Computer

rexec remotePC defrag C: /F

This command used the rexec command to force a defragment of the C: drive on the computer named remotePC. You can use whatever you want to for the command (I just used defrag C: /F as an example). This is very useful for remote maintenance.

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