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So next, let me show you real briefly how to work with command history.

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Now, you see,

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I have run a bunch of commands, and I can use the up arrow key and

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cycle through and find the commands that I ran before.

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And if I find something I want,

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I can just hit Enter and rerun that command. Get‑history, if I type it right,

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will show me all of the commands, and there you can see the history

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ID. You can scroll up to see all the commands.

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Now,

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these history items will only last for as long as your PowerShell session

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is running, and there is a limit to what you can see.

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There was a variable called $MaximumHistoryCount, and just

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so you know there, I just typed $Max and then hit Tab and

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it auto‑completed that value.

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That's something you want to get in the habit of doing in PowerShell.

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So, by default, my PowerShell session will maintain a history list of 4096 items.

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Once they hit 4097, the oldest item is deleted and the next item then moves up.

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You can adjust that variable if you need to make it larger or

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smaller. So you can do the up and down arrows.

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You can use the history command.

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So if I want to say, what did I have here in history line item 10? All right,

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that was running Get‑Verb ‑more.

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If I want to run that, I can do r 10, and that then reruns that command.

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Now, what is r?

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Well,

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let's do get‑alias r. That resolves to Invoke‑History.

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If I do get, because I showed you h,

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let's do get‑alias h, and you can see that resolves to Get‑History.

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So that is one way that we can look at history using the history cmdlets and the up and down arrows.