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Software & Coding Articles
Page 43 of 83
How to run PowerShell commands from the command prompt?
To run Powershell commands from the command prompt or cmd, we need to call the PowerShell process PowerShell.exe.ExampleSee the sample example, C:\> Powershell.exe -Command "Write-Output 'Hello world'" Hello worldSimilarly, you can call any command. We will use another example to get service informationC:\> Powershell.exe -Command "Get-Service Spooler" Status Name DisplayName ------ ---- ----------- Running Spooler Print SpoolerTo run multiple commands, C:\> Powershell.exe -Command "Stop-Service Spooler -verbose -passthru; Start-Service Spooler -verbose -passthru"OutputVERBOSE: Performing the operation "Stop-Service" on target "Print Spooler (Spooler)". Status Name DisplayName ------ ---- ----------- Stopped Spooler Print Spooler VERBOSE: Performing the operation "Start-Service" on ...
Read MoreHow to get empty files in Windows OS using PowerShell?
To get the list of empty files in Windows OS using PowerShell, there are two ways, a) Using Length parameter. We will count the length of the file. If it is 0 then the file is empty as shown below.Get-ChildItem C:\Temp\ -Recurse | where{$_.Length -eq 0} | Select @{N='EmptyFiles';E={$_.FullName}}Output:b) Another method is a long one that we don’t want to go into. We need to check each file's content and if it is empty then we will declare that file as an empty file.Get-ChildItem C:\Temp -Recurse -File | foreach{ if((Get-Content $_.FullName) -eq $null){ ...
Read MoreDifference Between 3NF and BCNF
In this post, we will understand the difference between 3NF and BCNF.3NFThere shouldn’t be any transitive dependency.There shouldn’t be any non-prime attribute that depends transitively on a candidate key.It is not as strong as BCNF.It has high redundancy.The functional dependencies are already present in INF and 2NF.It is easy to achieve.It can be used to achieve lossless decomposition.BCNFFor any relation A->B, ‘A’ should be a super key of that specific relation.It is stronger than 3NF.The functional dependencies are present in 1NF, 2NF and 3NF.It has low redundancy in comparison to 3NF.The functional dependencies may or may not be preserved.It is ...
Read MoreDifference Between Linear and Logistic Regression
In this post, we will understand the difference between linear regression and logistic regression.Linear RegressionIt helps predict the variable that is continuous, and is a dependent variable.This is done using a given set of independent variables.It extrapolates a line to find the value of dependent variable.Least square methods are used to estimate the accuracy.The best fit line is found, that helps predict the output.It is generally a continuous value.The relation between the dependent variable and independent variable has to be linear.The independent variables may have collinearity between them.It is considered a machine learning problem, i.e an applied statistics problem.Logistic RegressionIt ...
Read MoreDifference Between Grant and Revoke
In this post, we will understand the difference between grant and revoke.GrantIt is a DCL command.It grants permissions to users on database objects.It can also be used to assign access rights to users.For every user, the permissions need to be specified.When the access is decentralized, permission granting is easier.Syntax:grant privilege_name on object_name to {user_name | public | role_name}RevokeIt is a DCL command.It removes permissions if they are granted to users on database objects.It takes away/revokes the rights of the users.If access for a user is removed, all specific permissions provided by that user to others will be removed.If decentralized access ...
Read MoreAgile Software Process and its Principles?
IntroductionIn case of software engineering, the software development takes a major chunk of the whole process. While Software development itself means dividing the whole development into multiple phases such as designing, product management, project management etc., organizations across the world follow various software development methodologies for successful project management.Various methodologies such as Agile methodologies, Waterfall model, DevOps deployment, Rapid application development etc. used by different organizations and all of them have their own share of pros and cons. However it’s the Agile software development methodology, which is widely used across the globe due to its iterative development approach.What is Agile ...
Read MoreHow to uninstall the PowerShell Module?
To uninstall the PowerShell module, we can directly use the Uninstall-Module command but the module should not be in use, otherwise, it will throw an error.When we use the Uninstall-Module command, it can uninstall the module from the current user profile or from the all users profile.Uninstall-Module 7Zip4PowerShell -Force -VerboseAnother method, Get-InstalledModule 7Zip4Powershell | Uninstall-Module -Force -VerboseIf you have multiple versions of the same module installed in the PowerShell, and if you want to uninstall all of them then use the -AllVersions Parameter.Uninstall-Module 7Zip4PowerShell -AllVersions -Force -VerboseIf you want to uninstall the specific version, we can use -RequiredVersion.Uninstall-Module 7Zip4PowerShell -RequiredVersion ...
Read MoreHow to install the latest PowerShell module version?
Although simply running Install-Module command picks up the latest version of the module, we can still use the -RequiredVersion and -MinimumVersion parameter to install the latest version manually. Below command directly installs the latest available version of the module.In this example we are using 7Zip4PowerShell module.Install-Module 7Zip4PowerShell -Scope AllUsers -Force -VerboseTo manually install the latest version of the PowerShell module, there are two methods.Use the -RequiredVersion parameter if you know the latest version of the module.Use the -MinimumVersion parameter if you know the minor version of the module and it will pick up the latest version.Using -RequiredVersion ParameterThis parameter installs ...
Read MoreHow to update the windows host file entry using PowerShell?
Let say you want to update the host file particular entry, we have the below host file in our local computer.ExampleGet-Content $env:windir\system32\drivers\etc\hostsOutput# For example: # # 102.54.94.97 rhino.acme.com # source server # 38.25.63.10 x.acme.com # x client host # localhost name resolution is handled within DNS itself. # 127.0.0.1 localhost # ::1 localhost 8.8.8.8 Google.comWe need to update the google.com entry to IP address ...
Read MoreHow to add the entry in the windows host file using PowerShell?
To add the content to the host file, we need to first retrieve the content using the Get-Content command and the need to set the content to the host file after adding the entry. The Code is shown below. We need to add the global entry to it.Example$file = "C:\Windows\System32\drivers\etc\hosts" $hostfile = Get-Content $file $hostfile += "8.8.8.8 Google.com" Set-Content -Path $file -Value $hostfile -ForceOnce you check the host file entry "8.8.8.8 Google.com" will be added to the host file.To add the entry on the remote computer, you just need to point that file location to the host file of the remote server and the rest of ...
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