win10-powershell.md

1. Create the soft link like ln in linux

   cmd /c mklink /d linkname target (required the administration previlige)

2. show the enviroment variable

   ls env:

3. get a specific enviroment variable x = "XXX"

   $env:x="XXX"

4. delete a specific enviroment variable x

   del env:x

5. update a specific enviroment variable x to "YYY"

   $env:x="YYY"

6. add something to an exist enviroment variable x

   $env:x+="xxx"