Powershell is designed for task automation and configuration management. It combines a command-line interface and a scripting language built on the .NET framework. It is object-oriented so it can handle complex data types and interact with system components more effectively. Can support macOS and Linux.
Powershell commands are known as cmdlets (command-lets). They follow a Verb-Noun naming convention. The Noun specifies the object on which the action is performed.
Get-Command - list all available cmdlets, functions, aliases, and scripts.
Get-Command -CommandType "Function" - filter commands by type function.
Get-Help Get-Date - provides detailed info about cmdlets.
Get-Alias - lists cmd.exe aliases.
Find-Module - allows to search for modules in online repositories.
Install-Module - download and install a module. and example is Install-Module -Name "PowerShellGet".
Get-ChildItem - lists the files and directories in a location specified with the -PATH parameter.
Set-Location _location - set directory to change to.
New-Item -Path ".\captain-cabin\captain-wardrobe" -ItemType "Directory" - create new item with file-path and file-type.
Remove-Item -Path '\Users\username\file.txt - remove item or dir.
Copy-Item -Path .\Users\username\file.txt -Destination .\User\otheruser\newfile.txt - copy file to location.
Get-Content -Path ".\file.txt" - read file contents.
Get-ChildItem | Sort-Object Length - get current dir objects and sort by size.
Get-ChildItem | Where-Object -Property "Extension" -eq ".txt" - filter objects.
Get-ChildItem | Select-Object Name,Length - select specific properties from objects or limit the number of objects returned.
Get-ChildItem | Sort-Object Length -Descending | Select-Object -First 1 - pipe multiple items.
Select-String -Path ".\captain-hat.txt" -Pattern "hat" - searches for text patterns within files (similar to grep).
-eq - equal to.
-ne - not equal to.
-gt - greater than.
-ge - greater than or equal to.
-lt - less than.
-le - less than or equal to.
-like - used to match a patern.
Get-ComputerInfo - retrieves comprehensive system information, including OS information, hardware specifications, BIOS details, and more.
Get-LocalUser - lists all the local user accounts on the system.
Get-NetIPConfiguration - provides detailed information about the network interfaces on a system, including IP Addresses, DNS servers, and gateway configurations.
Get-NetIPAddress - shows details fora ll IP addresses configured on the system.
Get-Process - provides a detailed view of all currently running processes, including CPU and memory usage.
Get-Service - allows the retrieval of information about the status of services on teh machine.
Get-NetTCPConnection - displays current TCP connections.
Get-FileHash - generating file hashes.
Invoke-Command - for executing commands on remote systems.
-ep Bypass -nop - these flags disable PowerShell's usual restrictions, allowing scripts to run without interference from security settings or user profiles.
DownloadFile - method that pulls a file from a remote server.
iex - executes a script.