List Hidden Files

To list hidden files, issue:

dir PATH /A:H /B

where PATH is either specified, in which case the dir command lists the files in that path or PATH is omitted, in which case the files in the current directory are listed.

Delete Hidden Files

In order to remove a hidden file, issue:

del /A:H FILE

where FILE is a hidden file.

To delete recursively, the /S switch can be appended:

del PATH /A:H  /S 

Blank the Screen from Command Line

The command:

ping -n 6 127.0.0.1 > nul && explorer C:\Windows\System32\scrnsave.scr

will blank the screen in 6 seconds.

Note that C:\Windows\System32\scrnsave.scr must exist and must be invoked via explorer.

Reload / Refresh Environment Variables

The following script from chocolatey reloads the environment variables on Windows.

@echo off
::
:: RefreshEnv.cmd
::
:: Batch file to read environment variables from registry and
:: set session variables to these values.
::
:: With this batch file, there should be no need to reload command
:: environment every time you want environment changes to propagate

::echo "RefreshEnv.cmd only works from cmd.exe, please install the Chocolatey Profile to take advantage of refreshenv from PowerShell"
echo | set /p dummy="Refreshing environment variables from registry for cmd.exe. Please wait..."
 
goto main

:: Set one environment variable from registry key
:SetFromReg
    "%WinDir%\System32\Reg" QUERY "%~1" /v "%~2" > "%TEMP%\_envset.tmp" 2>NUL
    for /f "usebackq skip=2 tokens=2,*" %%A IN ("%TEMP%\_envset.tmp") do (
        echo/set "%~3=%%B"
    )
    goto :EOF

:: Get a list of environment variables from registry
:GetRegEnv
    "%WinDir%\System32\Reg" QUERY "%~1" > "%TEMP%\_envget.tmp"
    for /f "usebackq skip=2" %%A IN ("%TEMP%\_envget.tmp") do (
        if /I not "%%~A"=="Path" (
            call :SetFromReg "%~1" "%%~A" "%%~A"
        )
    )
    goto :EOF
 
:main
    echo/@echo off >"%TEMP%\_env.cmd"

    :: Slowly generating final file
    call :GetRegEnv "HKLM\System\CurrentControlSet\Control\Session Manager\Environment" >> "%TEMP%\_env.cmd"
    call :GetRegEnv "HKCU\Environment">>"%TEMP%\_env.cmd" >> "%TEMP%\_env.cmd"

    :: Special handling for PATH - mix both User and System
    call :SetFromReg "HKLM\System\CurrentControlSet\Control\Session Manager\Environment" Path Path_HKLM >> "%TEMP%\_env.cmd"
    call :SetFromReg "HKCU\Environment" Path Path_HKCU >> "%TEMP%\_env.cmd"

    :: Caution: do not insert space-chars before >> redirection sign
    echo/set "Path=%%Path_HKLM%%!!%%Path_HKCU%%" >> "%TEMP%\_env.cmd"

    :: Cleanup
    del /f /q "%TEMP%\_envset.tmp" 2>nul
    del /f /q "%TEMP%\_envget.tmp" 2>nul

    :: capture user / architecture
    SET "OriginalUserName=%USERNAME%"
    SET "OriginalArchitecture=%PROCESSOR_ARCHITECTURE%"

    :: Set these variables
    call "%TEMP%\_env.cmd"

    :: Cleanup
    del /f /q "%TEMP%\_env.cmd" 2>nul

    :: reset user / architecture
    SET "USERNAME=%OriginalUserName%"
    SET "PROCESSOR_ARCHITECTURE=%OriginalArchitecture%"
 
    echo | set /p dummy="Finished."
    echo .

fuss/dos.txt ยท Last modified: 2019/04/12 17:31 by office

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