What can you do with PowerShell?
You may like following PowerShell tutorials:
- PowerShell reference variable
- Working with PowerShell Date Command (Get-Date)
- PowerShell find files modified in last N days
- How to check if file created last 24 hours using PowerShell?
- Delete list items created before N days using PowerShell in SharePoint Online
- How to create and use PowerShell global variable
How to impersonate in PowerShell?
- Name – The friendly name of the role assignment. Each time that you assign a role, an entry is made in the RBAC roles list. ...
- Role – The RBAC role to assign. When you set up impersonation, you assign the ApplicationImpersonation role.
- User – The service account.
- CustomRecipientScope – The scope of users that the service account can impersonate. ...
What are the logical operators in PowerShell?
about_Logical_Operators
- Short description. Describes the operators that connect statements in PowerShell.
- Long description. The PowerShell logical operators connect expressions and statements, allowing you to use a single expression to test for multiple conditions.
- See also
Do the math with PowerShell?
Well, PowerShell is only able to natively perform the most basic math. However, there is a .NET class called Math that we can use to perform more advanced math through PowerShell. To be technically precise, the class name is System.Math, but PowerShell usually allows you to omit the System part of the class name.
What does ampersand mean in PowerShell?
The ampersand tells PowerShell to execute the scriptblock expression. In essence, it's telling PowerShell that the stuff between the curly braces is code and to run it as code. Passing Arguments to Scriptblocks. Like functions, you can pass "parameters" to scriptblocks also known as arguments.
How do I use ampersand in PowerShell?
The ampersand (&) character is not allowed. The & operator is reserved for future use; wrap an ampersand in double quotation marks ("&") to pass it as part of a string. How do I wrap the ampersand in quotes without breaking the outer quotes for the Command parameter? Did you try to enclose the url in single quotes?
What does @() mean in PowerShell?
array subexpression operatorWhat is @() in PowerShell Script? In PowerShell, the array subexpression operator “@()” is used to create an array. To do that, the array sub-expression operator takes the statements within the parentheses and produces the array of objects depending upon the statements specified in it.
What is @{} in PowerShell?
@{} in PowerShell defines a hashtable, a data structure for mapping unique keys to values (in other languages this data structure is called "dictionary" or "associative array"). @{} on its own defines an empty hashtable, that can then be filled with values, e.g. like this: $h = @{} $h['a'] = 'foo' $h['b'] = 'bar'
What is the equivalent of && in PowerShell?
The & operator in PowerShell is just the ; or Semicolon. The && operator in PowerShell has to be run as an if statement.
How do I write a PowerShell script with multiple commands?
Using AND(&&) Operator If you want each command to be executed only if the previous one was successful, combine them with the && operator. You can use this in both CMD and Powershell. Usage: command1 && command2 && command3 [&& command4 ...]
What is $_ called in PowerShell?
The “$_” is said to be the pipeline variable in PowerShell. The “$_” variable is an alias to PowerShell's automatic variable named “$PSItem“. It has multiple use cases such as filtering an item or referring to any specific object.
What are the types of PowerShell operators?
PowerShell supports the following different types of operators:Arithmetic Operators.Assignment Operators.Comparison Operators.Logical Operators.Redirection Operators.Split and Join Operators.
What does F mean in PowerShell?
format operatorEnter the format operator "-f". The format operator -f is a binary operator that takes a format string as it's left operand and an array of values to format as it's right operand.
Is it hard to learn PowerShell?
Although Windows PowerShell is an unbelievably useful and powerful tool, it can be difficult to master. There are lots of little nuances that can cause PowerShell to behave in a way that is completely unexpected. Never mind the fact that new cmdlets are being added to PowerShell all the time.
Is PowerShell coding?
PowerShell language is a high-level proprietary programming syntax developed by Microsoft for the key purpose of enabling system administrators to automate actions and configurations. The language is based on object-oriented standards but can only be used in Windows environments.
What are PowerShell filters?
Filtering refers to the process of restricting the output of a cmdlet or a statement based on certain conditions. This helps in optimizing the results and the user will be able to see what he wants from the cornucopia of results. This is achieved in PowerShell with the help of the Where-object cmdlet.
How do you escape a character in PowerShell?
The PowerShell escape character is the backtick "`" character. This applies whether you are running PowerShell statements interactively, or running PowerShell scripts. I have not determined why, but the pound sign character "#" does not need to escaped as part of a hard coded Distinguished Name in PowerShell.
How do I concatenate strings in PowerShell?
In PowerShell, string concatenation is primarily achieved by using the “+” operator. There are also other ways like enclosing the strings inside double quotes, using a join operator, or using the -f operator. $str1="My name is vignesh."
Which operator combination is valid in PowerShell?
The Comparison OperatorsOperatorDescriptionne (not equals)Compares two values to be not equal.gt (greater than)Compares first value to be greater than second one.ge (greater than or equals to)Compares first value to be greater than or equals to second one.lt (less than)Compares first value to be less than second one.2 more rows
What is a horizontal tab in PowerShell?
The horizontal tab ( `t) character advances to the next tab stop and continues writing at that point. By default, the PowerShell console has a tab stop at every eighth space.
What is a special token in PowerShell?
PowerShell also has a special token to mark where you want parsing to stop. All characters that follow this token are used as literal values that aren't interpreted.
What is the u x hex?
The Unicode escape sequence ( `u {x}) allows you to specify any Unicode character by the hexadecimal representation of its code point. This includes Unicode characters above the Basic Multilingual Plane (> 0xFFFF) which includes emoji characters such as the thumbs up ( `u {1F44D} ) character. The Unicode escape sequence requires at least one hexadecimal digit and supports up to six hexadecimal digits. The maximum hexadecimal value for the sequence is 10FFFF.
What is null in PowerShell?
The null ( `0) character appears as an empty space in PowerShell output. This functionality allows you to use PowerShell to read and process text files that use null characters, such as string termination or record termination indicators. The null special character isn't equivalent to the $null variable, which stores a null value.
How does $HOME work in PowerShell?
You can see in the output that, for the first parameter, the variable $HOME is interpreted by PowerShell so that the value of the variable is passed to the function. The second use of $HOME comes after the stop-parsing token, so the string "$HOME" is passed to the function without interpretation.
What is vertical tab?
The vertical tab ( `v) character advances to the next vertical tab stop and writes the remaining output at that point. The rendering of the the vertical tab is device and terminal dependent.
What is the ANSI escape sequence?
The escape ( `e) character is most commonly used to specify a virtual terminal sequence (ANSI escape sequence) that modifies the color of text and other text attributes such as bolding and underlining. These sequences can also be used for cursor positioning and scrolling.
Long description
Most PowerShell commands, such as cmdlets, functions, and scripts, rely on parameters to allow users to select options or provide input. The parameters follow the command name and have the following form:
Default parameter values
Optional parameters have a default value, which is the value that is used or assumed when the parameter is not specified in the command.
Parameter attribute table
When you use the Full, Parameter, or Online parameters of the Get-Help cmdlet, Get-Help displays a parameter attribute table with detailed information about the parameter.
What is the meaning of "back up"?
Making statements based on opinion; back them up with references or personal experience.
What is an empty array denoted?
One more thing... an empty array (like to initialize a variable) is denoted @().
How to create an array?
To create an array, we create a variable and assign the array. Arrays are noted by the "@" symbol. Let's take the discussion above and use an array to connect to multiple remote computers:
What is @ in PowerShell?
Officially, @ is the "array operator." You can read more about it in the documentation that installed along with PowerShell, or in a book like "Windows PowerShell: TFM," which I co-authored.
Does PowerShell have comma separated lists?
PowerShell will actually treat any comma-separated list as an array:
Does dir return a list?
For instance, dir usually returns a list, but depending on the options, it might return a single object. If you are planning on iterating through the results with a foreach-object, you need to make sure you get a list back. Here's a contrived example:
Is @ an array identifier?
Make sure to check out Jeffrey Snover's answer below... @ is more than just an array identifier.
Long Description
Arithmetic Operators
- Use arithmetic operators (+, -, *, /, %) to calculate values in acommand or expression. With these operators, you can add, subtract, multiply,or divide values, and calculate the remainder (modulus) of a divisionoperation. The addition operator concatenates elements. The multiplication operatorreturns the specified number of copies of each element. ...
Assignment Operators
- Use assignment operators (=, +=, -=, *=, /=, %=) to assign, change,or append values to variables. You can combine arithmetic operators withassignment to assign the result of the arithmetic operation to a variable. For more information, seeabout_Assignment_Operators.
Comparison Operators
- Use comparison operators (-eq, -ne, -gt, -lt, -le, -ge) to comparevalues and test conditions. For example, you can compare two string values todetermine whether they are equal. The comparison operators also include operators that find or replace patternsin text. The (-match, -notmatch, -replace) operators use regularexpressions, and (-like, -notlike) use wildcards *. Containment co…
Logical Operators
- Use logical operators (-and, -or, -xor, -not, !) to connectconditional statements into a single complex conditional. For example, you canuse a logical -andoperator to create an object filter with two differentconditions. For more information, see about_Logical_Operators.
Redirection Operators
- Use redirection operators (>, >>, 2>, 2>>, and 2>&1) to send theoutput of a command or expression to a text file. The redirection operatorswork like the Out-File cmdlet (without parameters) but they also let youredirect error output to specified files. You can also use the Tee-Objectcmdlet to redirect output. For more information, see about_Redirection
Split and Join Operators
- The -split and -join operators divide and combine substrings. The -splitoperator splits a string into substrings. The -joinoperator concatenatesmultiple strings into a single string. For more information, see about_Split andabout_Join.
Type Operators
- Use the type operators (-is, -isnot, -as) to find or change the .NETFramework type of an object. For more information, see about_Type_Operators.
Unary Operators
- Use the unary ++ and -- operators to increment or decrement values and- for negation. For example, to increment the variable $a from 9 to10, you type $a++. For more information, see about_Arithmetic_Operators.
Special Operators
- Special operators have specific use-cases that do not fit into any otheroperator group. For example, special operators allow you to run commands,change a value's data type, or retrieve elements from an array.