some tip about Windows Commands

About cmd.exe

http://environmentvariables.org/Main_Page#List_of_Windows_environment_variables
*Run command with
 CMD /C ""  #Example: cmd /C "dir"
*Run command and do NOT close window
 CMD /K ""  #Exmple: cmd /K "python HelloWorld.py"
*Change directory without considering drive letter
 CD /D ""  #Exmple: CD /D "D:\exp"
 Power shell do NOT need /D
*Copy src("hello") folder and rename to dst("world") directory
 #Exmple: xcopy /Y /E D:\exp\hello D:\exp\world\
 It's important to add "\" in destination path
*Copy files in src("hello") folder to dst("exp"/"world\OMG\") directory
 #Exmple: xcopy /Y /E D:\exp\hello\* D:\exp\
 #Exmple: xcopy /Y /E D:\exp\hello\* D:\exp\world\OMG\
 Will create all folders to the dst path
*Windows Startup Scripts
 *.cmd under C:\Users\<UserName>\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup
*Windows grep equivalent command in windows
 java -version 2>&1 | findstr /R "version\ \"1*\.*[89].*\"$"
 TYPE MY_TEST.txt | findstr "version\ \""

About Powershell.exe

https://blog.darkthread.net/blog/powershell-learning-notes/
*Important!! First time to run powershell, you need to Set-ExecutionPolicy if .ps1 is not signed
 On a 64-bit OS you need to run Set-ExecutionPolicy for 32-bit and 64-bit PowerShell separately
 Set-ExecutionPolicy RemoteSigned
 Get-ExecutionPolicy
 Set-ExecutionPolicy Unrestricted -Scope CurrentUser
 This will set the execution policy for the current user (stored in HKEY_CURRENT_USER) rather than the local machine (HKEY_LOCAL_MACHINE).
 This is useful if you don't have administrative control over the computer.
*Create full path to ".\dummyfile" and overwrite it if exist
 New-Item -Path ".\dummyfile" -ItemType File -ErrorAction Ignore -Force
*Create full path to ".\dummyfile" without overwrite it
 New-Item -Path (Split-Path ".\dummyfile") -ItemType Directory -ErrorAction Ignore
*Concatenate multiple files into one file
 Get-Content .\Round?_log.txt | Out-File -Encoding ASCII -Append .\Combined.txt

About routing

route print

route -p add 172.0.0.0 mask 255.0.0.0 10.23.85.254 METRIC 1 IF 17
route -p add 47.0.0.0 mask 255.0.0.0 10.23.85.254 METRIC 1 IF 17
route -p add 10.0.0.0 mask 255.0.0.0 10.23.85.254 METRIC 1 IF 17
route -p add 192.168.0.0 mask 255.255.0.0 10.23.85.254 METRIC 1 IF 17
route -p add 10.23.85.254 mask 255.255.255.255 10.23.85.254 METRIC 1 IF 17
route -p add 192.168.210.0 mask 255.255.255.0 192.168.210.1 METRIC 1 IF 10
route delete 0.0.0.0
route -p add 0.0.0.0 mask 0.0.0.0 192.168.210.1 METRIC 1 IF 1
route -p add 0.0.0.0 mask 0.0.0.0 10.23.85.254 METRIC 2 IF 10
ipconfig /flushdns

About Windows Settings app

https://docs.microsoft.com/zh-tw/windows/uwp/launch-resume/launch-settings-app