Shulou(Shulou.com)06/03 Report--

Let's start with the basics. You should know the basic command line commands, such as dir,cd,del, etc.

We have these commands in PowerShell, but they are a little different, and we can use them to be more powerful.

For example, dir c:\ windows, we will get a list of files and folders located under c:\ windows. We can use the same commands under PowerShell to achieve the same goal, but we can get more functionality in PowerShell.

In PowerShell, when we run a command, it returns more than just a list of files and folders in this case. With these objects, we can do anything we want.

Dir is actually an alias for a PowerShell command called the Get-ChildItem and PowerShell commands-to make our parameters a little different, we can allocate more with their output because they output objects, so if we want to get a list of directories under c:\ windows in PowerShell, we will use the following directory c:\ windows-directory.

Now we want to know the use of the-directory switch, and the answer is very simple:

There is a command called get-help-or its alias help-which will tell us all about any command in PowerShell

So if I'm going to run the help directory or get the help Get-Childitem or Get-Help directory or any combination, I'll get all the information I need. For this problem, I can run help and learn how to use the Get-Help command, which also has switches like-detailed or-examples, which even provide us with examples of how commands are allowed to be used.

So how do we read this help? let's take a look at the Get-Help directory.

Anything in square brackets [] is optional, for example, [- Recurse] is optional, we don't have to use it, but if we want dir to be recursive, we will need it. The values in are types that you can use, such as a word, an array of words separated by commas.

It is also optional in [- Exclude], but if we want to exclude some directories or files from the output, we must use the-Exclude file name, directory name, file name using this switch.

Sometimes you will see [[- Path]], because the [- Path] switch is in square brackets, and you can place values that have no switch meaning:

Dir-path c:\ windows and dir c:\ windows are the same

The important thing to remember is that we don't use switches, we have to save the order in which values are written, for example:

Get-ChildItem [[- Path]] [[- Filter]]

Get-childitem c:\ windows * .dll-will provide us with files / folders ending in .dll

Get-childitem-path c:\ windows-filter * .dll

Get-childitem-filter * .dll-path c:\ windows

It cannot be:

Get-childitem * .dll c:\ windows

Do we say dir is an alias for Get-ChildItem?

To answer this question, we can use Get-Alias to query

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