Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
To get the certificate's start and expiry date using PowerShell, we first need to retrieve the certificate details using a thumbprint or other properties like friendly name, subject name, etc.Let say we have a certificate thumbprint details. So we can use the below command to retrieve the certificate's Start and End date along with the days remaining for the certificate expiry.ExampleGet-ChildItem Cert:\LocalMachine\My\43E6035D120EBE9ECE8100E8F38B85A9F1C1140F ` | Select @{N='StartDate';E={$_.NotBefore}}, @{N='EndDate';E={$_.NotAfter}}, @{N='DaysRemaining';E={($_.NotAfter - (Get-Date)).Days}}OutputStartDate EndDate DaysRemaining --------- ------- ... Read More
Suppose we know the Thumbprint of the certificate then we can use the below command to update or change the certificate's friendly name.Example$cert = Get-ChildItem ` -Path Cert:\LocalMachine\My\43E6035D120EBE9ECE8100E8F38B85A9F1C1140F$cert.FriendlyName = "mysitecert"The above command will update the certificate-friendly name to "mysitecert". If you don't know the thumbprint or how to retrieve it, you can use different properties like Subject name, friendly name, etc.Example$cert = Get-ChildItem -path ` Cert:\LocalMachine\My\` | where{$_.Subject -eq "CN=mysite.local"}$cert.FriendlyName = "mysitecert"
To install the certificate using PowerShell, we need to use the Import-Certificate command. For example, we have a certificate stored at the location C:\temp\Mycert.cer and we need to install it in the Personal store of the local machine.ExampleImport-Certificate -FilePath C:\Temp\Mycert.cer ` -CertStoreLocation Cert:\LocalMachine\My\You can also use the below method.PS C:\> Set-Location Cert:\LocalMachine\My\ PS Cert:\LocalMachine\My\> Import-Certificate -FilePath C:\Temp\Mycert.cerTo install a certificate on the remote computer, use the Invoke-Command method.SyntaxInvoke-Command -ComputerName RemoteServer1 -ScriptBlock {Import-Certificate -FilePath C:\Temp\Mycert.cer ` -CertStoreLocation Cert:\LocalMachine\My\ }The above command will install the certificate on RemoteServer1 from the path C:\temp of the remote server to the personal store of the remote machine.Read More
To export or download a certificate from the certificate store using PowerShell, we need to use the command Export-Certificate.First, you need to get the certificate details from the store. If you know the thumbprint, you can directly get the certificate details using the thumbprint and then use that details to export the certificate.Example$cert = (Get-ChildItem Cert:\LocalMachine\My\43E6035D120EBE9ECE8100E8F38B85A9F) Export-Certificate -Cert $cert -Type CERT -FilePath C:\Temp\Mycert.cerIn the above example, we are exporting the certificate from the LocalMachine -> Personal Store. You can choose a different path. Here, the certificate would be exported to the C:\temp\MyCert.cer. You can use the different types like P7B, SST to export the certificate. Alternatively, you ... Read More
To create a self-signed certificate there are various methods like OpenSSL, IIS, PowerShell, etc. Here, we will see how we can create a self-signed certificate with PowerShell.To create a self-signed certificate with PowerShell, we need to use the New-SelfSignedCertificate command. When you create a self-signed certificate manually, you need to give few properties like DNSName, FriendlyName, Certificate start date, expiry date, Subject, a path of the certificate. Similarly, you can use those properties for this command to create it. Not all properties are mandatory.ExampleNew-SelfSignedCertificate ` -CertStoreLocation Cert:\LocalMachine\My ` -DnsName "testdomain.local" -VerboseOutputPSParentPath: Microsoft.PowerShell.Security\Certificate::LocalMachine\My Thumbprint ... Read More
To create any dummy file of having any size with PowerShell, we can use the below command.Example$f = new-object System.IO.FileStream c:\temp\test.dat, Create, ReadWrite $f.SetLength(50MB) $f.Close()The above command will create 50MB of Test.dat dummy file in the C:\temp. Such files are used for testing purposes.
To get the default documents stored on the IIS default website page, you can use the below command.ExampleGet-WebConfigurationProperty -Filter //defaultDocument/files/add -PSPath 'IIS:\Sites\Default Web Site' -Name value ` | select valueOutputValue ----- Default.htm Default.asp index.htm index.html iisstart.htmTo check if the Default document contains a specific file, (Get-WebConfigurationProperty -Filter //defaultDocument/files/add -PSPath 'IIS:\Sites\Default Web Site' -Name value).value -contains 'iisstart.htm'The above command checks if the IIS default website contains any iisstart.htm on the default document page.You can also use another website instead of using 'Default Web site'. To get the default documents file at the IIS level, (Get-WebConfigurationProperty -Filter //defaultDocument/files/add -PSPath 'IIS:\' ... Read More
To copy only updated or newer files with PowerShell, we can use Copy-Item with some logic in the script that to check if the files exist on the destination folder if not then copy that file and if yes then compare the timestamp and copy the latest file. This would be tricky because we need to write several lines of code for it.But Windows support xCopy utility which can directly copy the newer or updated files and this utility we can accommodate in PowerShell as well.xCopy uses a switch called /d. its actual syntax is, Syntax/d [:MM-DD-YYYY]This means if the date ... Read More
In this program, we will calculate the rms (root mean square) of all the pixels in each channel using the Pillow library. There are a total three channels in an image and therefore, we will get a list of three values.Original ImageAlgorithmStep 1: Import the Image and ImageStat libraries. Step 2: Open the image. Step 3: Pass the image to the stat function of the imagestat class. Step 4: Print the root mean square of the pixels.Example Codefrom PIL import Image, ImageStat im = Image.open('image_test.jpg') stat = ImageStat.Stat(im) print(stat.rms)Output[104.86876722259062, 96.13661429330132, 91.8480515464677]
In this program, we will calculate the variance of all the pixels in each channel using the Pillow library. There are a total three channels in an image and therefore, we will get a list of three values.Original ImageAlgorithmStep 1: Import the Image and ImageStat libraries. Step 2: Open the image. Step 3: Pass the image to the stat function of the imagestat class. Step 4: Print the variance of the pixels.Example Codefrom PIL import Image, ImageStat im = Image.open('image_test.jpg') stat = ImageStat.Stat(im) print(stat.var)Output[5221.066590958682, 4388.697801428673, 4291.257706548981]