# Setting path in environment variable
$PATH = [Environment]::GetEnvironmentVariable("PATH")
echo $PATH
$app_path = "…"
[Environment]::SetEnvironmentVariable("PATH", "$PATH;$winrar_path", "Machine")

# List files in descending order of their sizes
PS C:\Users\...\scratch> Get-ChildItem -recurse | Select-Object Name, @{Name=MegaBytes”;Expression={$_.Length / 1MB}} | Sort -Descending -Property "MegaBytes"

# Download a file (wget alternative)
Start-BitsTransfer -Source $url -Destination $output

# Unzip a file using Winrar
winrar x .\ph-export--2016.tar.gz

# Show the contents of a file
Get-Content file_name

# Count number of lines
Get-Content .\xyz.csv | Measure-Object -Line

# Reload environment variables
refreshenv

# Find number of lines for all files in a directory
Get-ChildItem *.csv | ForEach-Object { Get-Content$_.FullName | Measure-Object -Line } | Format-Wide -Property Lines