Tag Archives: powershell

powershell

PowerShell tips – part 017.

PowerShell execution policies are a security mechanism to protect your system from running malicious scripts. Execution policies are based on trust Execution policies have various security levels, like: Unrestricted – the least restrictive policy is one that does not affect at all; it’s Unrestricted. Unrestricted execution policies are essentially disabled. Users can run all scripts… Read More »

PowerShell tips – part 015.

This PowerShell script will create a screenshot file named MyScreenshot.bmp. I created a folder named temp and I put this PowerShell script named screen.ps1. The source code of this script is this:

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$File = "MyScreenshot.bmp"
Add-Type -AssemblyName System.Windows.Forms
Add-type -AssemblyName System.Drawing
# Gather Screen resolution information
$Screen = [System.Windows.Forms.SystemInformation]::VirtualScreen
$Width = $Screen.Width
$Height = $Screen.Height
$Left = $Screen.Left
$Top = $Screen.Top
# Create bitmap using the top-left and bottom-right bounds
$bitmap = New-Object System.Drawing.Bitmap $Width, $Height
# Create Graphics object
$graphic = [System.Drawing.Graphics]::FromImage($bitmap)
# Capture screen
$graphic.CopyFromScreen($Left, $Top, 0, 0, $bitmap.Size)
# Save to file
$bitmap.Save($File)
Write-Output "Screenshot saved to:"
Write-Output $File

To run this script you need to be allowed with this args:

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PS C:\temp> powershell.exe -executionpolicy bypass -file .\screen.ps1
Screenshot saved to:
MyScreenshot.bmp

PowerShell tips – part 014.

Today I will tell you about how to use PowerShell command with DIR command with filters. Let’s see some examples with outputs:

PowerShell
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PS C:\Python364> help dir
 
NAME
    Get-ChildItem
 
SYNTAX
    Get-ChildItem [[-Path] <string[]>] [[-Filter] ] [-Include <string[]>] [-Exclude
    <string[]>] [-Recurse] [-Force] [-Name] [-UseTransaction] [-Attributes
    <FlagsExpression[FileAttributes]> {ReadOnly | Hidden | System | Directory | Archive | Device |
    Normal | Temporary | SparseFile | ReparsePoint | Compressed | Offline | NotContentIndexed |
    Encrypted | IntegrityStream | NoScrubData}] [-Directory] [-File] [-Hidden] [-ReadOnly]
    [-System]  []
 
    Get-ChildItem [[-Filter] ] -LiteralPath <string[]> [-Include <string[]>] [-Exclude
    <string[]>] [-Recurse] [-Force] [-Name] [-UseTransaction] [-Attributes
    <FlagsExpression[FileAttributes]> {ReadOnly | Hidden | System | Directory | Archive | Device |
    Normal | Temporary | SparseFile | ReparsePoint | Compressed | Offline | NotContentIndexed |
    Encrypted | IntegrityStream | NoScrubData}] [-Directory] [-File] [-Hidden] [-ReadOnly]
    [-System]  []
 
 
ALIASES
    gci
    ls
    dir
 
 
REMARKS
    Get-Help cannot find the Help files for this cmdlet on this computer. It is displaying only
    partial help.
        -- To download and install Help files for the module that includes this cmdlet, use
    Update-Help.
        -- To view the Help topic for this cmdlet online, type: "Get-Help Get-ChildItem -Online"
    or
           go to http://go.microsoft.com/fwlink/?LinkID=113308.
 
...
 
PS C:\Python364> dir
 
 
    Directory: C:\Python364
 
 
Mode                LastWriteTime     Length Name
----                -------------     ------ ----
d----         11/1/2018   8:28 PM            build
d----         2/15/2019   1:53 PM            catafest
da---         2/15/2019   1:53 PM            catafest_jupyter-book
d----        12/17/2018  11:51 AM            data
d----         11/1/2018   8:38 PM            dist
d----          9/7/2018   3:04 PM            djangowebsite
d----          9/7/2018   3:05 PM            djangowebsite001
d----         3/23/2018  11:32 PM            DLLs
 
...
 
PS C:\Python364> dir | Sort
 
 
    Directory: C:\Python364
 
 
Mode                LastWriteTime     Length Name
----                -------------     ------ ----
-a---        12/28/2018   8:47 PM         67 __main__.py
d----         2/15/2019  12:10 AM            __pycache__
-a---        12/20/2018   3:13 PM       7107 _frame_0.jpg
-a---        12/20/2018   3:13 PM       7107 _frame_135.jpg
-a---         8/29/2018   9:58 AM         64 aaa.vir
-a---         2/15/2019  12:25 AM       1366 aiohttp_001.py
-a---          1/2/2019  12:58 AM      23187 all_one.jpg
-a---         1/28/2019   1:18 PM     241734 Anonymized20190128.dcm
-a---          6/1/2018   3:56 PM       2628 asciimatics_001.py
-a---         2/14/2019  11:56 PM       1536 asyncio_example.py
-a---        12/20/2018   1:33 PM        162 black.png
 
...
 
PS C:\Python364> dir | Sort CreationTime -Descending
 
 
    Directory: C:\Python364
 
 
Mode                LastWriteTime     Length Name
----                -------------     ------ ----
-a---         2/16/2019  11:55 PM        870 shapes_002.py
-a---         2/16/2019  11:45 PM        725 ORB_001.py
-a---         2/16/2019  10:24 PM     318772 sky_shapes.png
-a---         2/16/2019  10:41 PM        944 shapes_001.py
da---         2/15/2019   1:53 PM            catafest_jupyter-book
d----         2/15/2019   1:53 PM            catafest
d----         2/15/2019  12:44 PM            mybookname
-a---         2/15/2019  12:38 PM       2526 notebook_tk_001.py
-a---         2/15/2019  12:59 AM        138 folium_001.py
 
...
 
PS C:\Python364> dir | Get-ChildItem -Filter Encrypted
 
 
    Directory: C:\Python364
 
 
Mode                LastWriteTime     Length Name
----                -------------     ------ ----
-a---         8/29/2018   9:58 AM         64 aaa.vir
-a---         2/15/2019  12:25 AM       1366 aiohttp_001.py
-a---          1/2/2019  12:58 AM      23187 all_one.jpg
-a---         1/28/2019   1:18 PM     241734 Anonymized20190128.dcm
-a---          6/1/2018   3:56 PM       2628 asciimatics_001.py
-a---         2/14/2019  11:56 PM       1536 asyncio_example.py
-a---        12/20/2018   1:33 PM        162 black.png
-a---         1/28/2019   3:17 PM   27473814 bmode.dcm
-a---        10/22/2018   9:21 PM       2955 calculator.py
-a---        10/24/2018   3:10 PM       1281 camera.py
-a---        12/20/2018   1:28 PM     155735 cells.jpg
-a---         1/28/2019   1:04 PM      84392 cells_gray.jpg
-a---         8/29/2018   8:36 PM        131 cha.py
-a---          6/5/1999   4:18 AM     525968 CT-MONO2-16-brain
-a---         6/11/2018   7:35 PM        410 cv2_webcam_001.py
-a---         6/11/2018   7:40 PM       4715 cv2_webcam_002.py
-a---         11/6/2018   3:55 PM       3376 delegate_001.py
-a---        12/20/2018   5:32 PM      18230 detect_video.py
-a---        12/20/2018   5:39 PM       1542 detect_video_002.py
-a---         3/10/2018  11:57 PM       1408 deviantart_friends.py
-a---         9/16/2018   8:19 PM         12 djproj.bat
-a---        12/25/2018  10:52 PM       1017 dragon.py
-a---        12/25/2018  10:54 PM   11197764 dragon.tar.gz
-a---         1/28/2019   3:17 PM   39846490 E1154S7I.dcm
-a---        12/20/2018   3:58 PM      91853 everest.jpg
-a---        11/29/2018   9:54 PM       3906 exit.png

PowerShell tips – part 013.

Using the administrator PowerShell:

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PS C:\WINDOWS\system32> $currentPrincipal = New-Object Security.Principal.Window
sPrincipal([Security.Principal.WindowsIdentity]::GetCurrent())
PS C:\WINDOWS\system32> $currentPrincipal.IsInRole([Security.Principal.WindowsBu
iltInRole]::Administrator)
True

Using the regular user PowerShell:

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PS C:\Users\catalin> $currentPrincipal = New-Object Security.Principal.WindowsP
rincipal([Security.Principal.WindowsIdentity]::GetCurrent())
PS C:\Users\catalin> $currentPrincipal.IsInRole([Security.Principal.WindowsBuil
tInRole]::Administrator)
False

PowerShell tips – part 012.

From Azure documentation we can read this: The Azure support we are going to use requires PowerShell version 5.0 or higher.

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C:\WINDOWS\system32>powershell
Windows PowerShell
Copyright (C) 2014 Microsoft Corporation. All rights reserved.
 
PS C:\WINDOWS\system32> $PSVersionTable.PSVersion
 
Major  Minor  Build  Revision
-----  -----  -----  --------
4      0      -1     -1

The update of PowerShell can be found here, see the table: Windows PS 3.0 PS 4.0 PS 5.0 PS 5.1 Windows 10 (see Note1) Windows Server 2016 – – – installed Windows 8.1… Read More »

PowerShell tips – part 011.

This is another tutorial about PowerShell and Windows 8.1 operating system. You can try with another Windows OS version and PowerShell. The first issue is to show all active services on your computer:

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Get-Service | Where-Object {$_.Status -eq “Running”}

This will show all event logs on your computer:

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Get-EventLog -List

More info about restricted execution policy that prevents scripting on PowerShell,… Read More »

PowerShell tips – part 010.

Windows PowerShell modules provide a convenient way to package reusable ode by using modules. The concept of modules is a package that contains Windows PowerShell version 2.0 commands. Anyone can write and install a Windows PowerShell script module with administrator rights. There is three default location for Windows PowerShell modules: home users, Windows PowerShell home… Read More »