Code Samples for Intro to PowerShell Article

add-ints-example.ps1

PS> 2 + 2
4

divide-floats.ps1

PS> 4.2 / 3
1.4

env-path.ps1

PS> Get-ChildItem env:

# And to get to a specific one:
PS> Get-Content env:PATH

env-var.ps1

PS> $env:PATH

first-command.ps1

PS> Get-Process

force-int.ps1

PS> "2" + 2
22  # A string
PS> [Int] "2" + 2
4   # An integer.  The conversion only applies to the "2"

format-list.ps1

PS> Get-Command Get-Alias | Format-List

get-alias.ps1

PS> Get-Alias

get-command.ps1

PS> Get-Command

help-help.ps1

PS> Get-Command Get-Help | Format-List

# Or, if you're feeling cheeky:

PS> Get-Help Get-Help

help.ps1

PS> Get-Help command

# You can also get help by adding the ? parameter

PS> command -?

job-commands.ps1

  PS> Get-Command -noun Job

list-commands.ps1

PS> Get-ChildItem

# You can also do:
PS> gci
PS> dir

# And, just to make you feel a little more at home...
PS> ls

list.ps1

PS> Get-ChildItem

list.sh

$ ls -l

members.ps1

PS> Get-Process | Get-Member

# Another similar command that also prints out the values is:

PS> (Get-Process)[0] | Format-List

new-commands.ps1

PS> Get-Command -verb new

process-type.ps1

  PS> (Get-Process)[0] | Get-TypeData

profile-check.ps1

PS> Test-Path $profile

profile-edit.ps1

# Use whichever editor you love best
PS> code $profile

profile-example.ps1

# Microsoft.PowerShell_profile.ps1

# You can customize the window itself by accessing $Host.UI.RawUI
$window = $Host.UI.RawUI
$window.WindowTitle = "Pa-pa-pa-pa-pa-pa-POWERSHELL"
$window.BackgroundColor = "Black"
$window.ForegroundColor = "Gray"

# You can define functions (remember to follow the Verb-Noun convention!)
function Count-History {
  (Get-History | Measure-Object).count
}

function beep {
  echo `a
}

function Edit-Profile {
  [CmdletBinding()]
  [Alias("ep")]
  PARAM()

  vim $profile
}

# You can set aliases
# NOTE: In PowerShell you can only alias simple commands.  Unlike Bash,
# you can't alias commands with arguments flags.  If you want to do that
# you should define a function instead.
Set-Alias touch New-Item  # old habits die hard, amirite?

# You can customize your prompt!
function prompt {
  # ... see the next section for more details on this.
}

profile-options.ps1

PS> $profile | Get-Member -type NoteProperty

profile.ps1

PS> $profile

prompt-complicated-example.ps1

~/Documents/blog
PS [102] master -> 

prompt-complicated.ps1

function prompt {
  $loc = (Get-Location).Path.Replace("$HOME", "~")
  $gitBranch = git branch | Select-String "\*"
  if (!$gitBranch) {
    $gitBranch = ""
  } else {
    $gitBranch = $gitBranch.ToString().Replace("`* ", "")
  }
  $histCount = (Get-History | Measure-Object).count
  Write-Host -ForegroundColor yellow "`n $loc"
  Write-Host -NoNewLine "PS [$histCount] $gitBranch ->"
  return " "
}

prompt-simple.ps1

function prompt {
 $histCount = (Get-History | Measure-Object).count
 return "POWERSHELL LEVEL OVER $histCount THOUSAND!!! >"
}

select-10.ps1

PS> Get-Process | Sort-Object CPU -descending | Select-Object -first 10

select-process-name.ps1

PS> Get-Process | Sort-Object CPU -descending | Select-Object ProcessName -first 10

select.ps1

PS> Get-Process | Select-Object Id, ProcessName -last 20

unix-commands.ps1

# pwd
PS> Get-Location # or gl or pwd

# ls
PS> Get-ChildItem # or gci or dir or ls

# cd
PS> Set-Location # or sl or chdir or cd

# cp
PS> Copy-Item # or copy or cpi or cp

# mv
PS> Move-Item # or move or mi or mv

# cat
PS> Get-Content # or gc or type

# mkdir
PS> New-Item -ItemType Directory  # use ni for short

# touch
PS> New-Item -ItemType File  # use ni for short

# rm
PS> Remove-Item # or del or erase or ri

# rm -rf
PS> Remove-Item -Recurse -Force

# head or tail
PS> Select-Object -first  # or -last
# usage: Get-Process | Select-Object -first 10

# find
PS> Get-ChildItem -filter *.rb -recurse .
# but for a slightly easier to read version:
PS> Get-ChildItem -filter *.rb -recurse . | Select-Object FullName

where.ps1

PS> Get-Process | Where-Object WS -gt 150MB