Strings and Arrays in PowerShell Core for Linux

1. Use the yum command to sync the package index files from their sources via the Internet.

sudo yum check-update

2. Use the yum command to install the newest versions of all installed packages on CentOS.

sudo yum update

3. Register the Microsoft RedHat repository.

curl https://packages.microsoft.com/config/rhel/7/prod.repo | sudo tee /etc/yum.repos.d/microsoft.repo

4. Install PowerShell.

sudo yum install -y powershell

5. Start PowerShell.

pwsh

1. Create a single quote string 'Hello PowerShell - Today is $(Get-Date)'.

'Hello PowerShell - Today is $(Get-Date)'

2. Create a double quote string "Hello PowerShell - Today is $(Get-Date)".

"Hello PowerShell - Today is $(Get-Date)"

3. Show the properties of the double quote string using Get-Member and a pipeline.

"Hello PowerShell - Today is $(Get-Date)" | Get-Member

4. Create four variables (domain, firstname, lastname, and department) using the following information:
   • Domain - scriptingguru.com
   • First name - John
   • Last name - Smith
   • Department - History

$domain = 'scriptingguru.com'
$firstname = 'John'
$lastname = 'Smith'
$department = 'History'

5. Using the previously entered variables, derive the following values using the string concatenation operator (+):
   • Name = firstname lastname
   • DisplayName = firstname lastname (department)
   • SamAccountName = firstname.lastname
   • EmailAddress = [email protected]

$firstname + ' ' + $lastname
$firstname + ' ' + $lastname + ' (' + $department + ')'
$firstname + '.' + $lastname
$firstname + '.' + $lastname + '@' + $domain

6. Once again using the previously entered variables, obtain the same values using PowerShell string expansion.

"$firstname $lastname"
"$firstname $lastname ($department)"
"$firstname.$lastname"
"$firstname.$lastname@$domain"

1. Create an array named A that contains the seven numeric (int) values of 29, 51, 6, 8, 19, 39, and 180.

$A = 29,51,6,8,19,39,180

2. Create an array named B using the range operator (..) containing the values 1 through 8.

$B = 1..8

3. Create a strongly-typed 32-bit integer array named ia containing four integers (1148, 2195, 3376, and 9000).

[int32[]]$ia = 1148,2195,3376,9000

4. Display all the elements in the array $A.

$A

5. Display the first element in the array $A.

$A[0]

6. Dispay the third element in the array $A.

$A[2]

7. Recreate the array $A to contain the numbers 0 through 9 using the range operator (..).

$A = 0 .. 9

8. Display the last three elements of the array, using negative indexes.

$A[-1..-3]

9. Exit PowerShell.

exit