Building intelligent escalation chains for modern SRE. Podcast Who is building clouds for the independent developer? Featured on Meta. Now live: A fully responsive profile. Reducing the weight of our footer. Visit chat. Linked 2. Related Hot Network Questions. Question feed. This feature lets you update the help files on computers that do not have access to the Internet, and makes it easier to update the help files on multiple computers. In Windows PowerShell 3. Although it was possible to import a module from a remote computer, or obtain a reference to a PSModuleInfo object from a remote computer by using PowerShell remoting, the HelpInfoUri property was not preserved, and Save-Help would not work for remote module Help.
In Windows PowerShell 4. It is also possible to save a PSModuleInfo object to disk or removable media by running Export-Clixml on a computer that does not have Internet access, import the object on a computer that does have Internet access, and then run Save-Help on the PSModuleInfo object.
The saved help can be transported to the remote computer by using removable storage media, such as a USB drive. The help can be installed on the remote computer by running Update-Help. This process can be used to install help on computers that do not have any kind of network access.
To install saved help files, run the Update-Help cmdlet. Add its SourcePath parameter to specify the folder in which you saved the Help files. Without parameters, a Save-Help command downloads the newest help for all modules in the session and for modules that are installed on the computer in a location listed in the PSModulePath environment variable.
This action skips modules that do not support Updatable Help without warning. The Save-Help cmdlet checks the version of any help files in the destination folder. If newer help files are available, this cmdlet downloads the newest help files from the Internet, and then saves them in the folder. The Save-Help cmdlet works just like the Update-Help cmdlet, except that it saves the downloaded cabinet.
You do not have to extract the help files from the cabinet file. The Update-Help cmdlet extracts the help files, validates the XML for safety, and then installs the help files and the help information file in a language-specific subfolder of the module folder. You must be a member of the Administrators group on the computer to download the help files for these modules. This example shows three different ways to use Save-Help to save the help for the DhcpServer module from an Internet-connected client computer, without installing the DhcpServer module or the DHCP Server role on the local computer.
This example shows how to install help that you saved in Example 1 for the DhcpServer module on a computer that does not have Internet access. This command downloads the newest help files for all modules in the UI culture set for Windows on the local computer. When a module is installed on the computer, you can type the module name as the value of the Module parameter, even if the module is not imported into the current session.
The command uses the Credential parameter to supply the credentials of a user who has permission to write to the file share. Because the CustomSQL module is not installed on the computer, the sequence includes an Invoke-Command command that gets the module object for the CustomSQL module from the Server02 computer and then pipes the module object to the Save-Help cmdlet.
The method to download zip files is pretty much the same as a normal file. But I wanted to show you how that downloads and extracts the zip file. This way you can immediately process the files inside the zip file without manual interaction. I am going to use this sample csv on GitHub which we can download in a zip file.
We have to set a destination for the zip file itself and a path where we want to extract the files to. The next step is to extract the zip file automatically in the desired location. For this we are going to use a COM object. With the COM object we can extract the zip file and copy the content to the desired location.
When you need to scrape a website first then it can be a little bit more work to set up properly. Try to use the Start-BitsTransfer cmdlet for downloading files and set the priority to normal when using it in an autonouse script.
BitsTransfer has more option when it comes to retries, resuming and bandwidth control then Invoke-WebRequest. If you have any questions about how you can download a file with PowerShell, then drop a comment below.
Thanks for this. I plan to use this in conjunction with Windows task scheduler to download a fresh file every week. I do not wish to overwrite the previous files.
How do I modify the Invoke-Webrequest script to do this? So, to download a file from the Internet website, you can use a shorter command.
Instead of typing a full cmdlet name, you can use for example :. If the file already exists, it is overwritten without any warning.
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