本文汇总记录一些各个平台上的常用脚本和指令

Shell

# 反向连接文件到一个
for i in $(ls -r); do cat $i >> new.md; done;

# 将.png结尾的文件名改为 .jpg
ls | cut -d '.' -f 1 | xargs -I {1} mv {1}.png {1}.jpg

for x in *.jpeg; do mv "$x" "${x%.jpeg}.jpg"; done

Poweshell

$PWD = Get-Location

Write-Output "Rove dll"
Remove-Item *.dll

Write-Output "Build Dll"
csc /t:library .\JskyLib.cs
vbc /t:library .\JskyLib-vb.vb

[Reflection.Assembly]::LoadFile("$PWD\JskyLib.dll")
[Reflection.Assembly]::LoadFile("$PWD\JskyLib-vb.dll")


Write-Output "Using JskyLib.Math"
[System.Console]::Write("`n`n1 + 2 = ") 
[JskyLib.Math]::Sum(1, 2)

Write-Output "Using JskyLibVB.MathVB"
[System.Console]::Write("`n`nPrint Version Message`n") 
[JskyLibVB.MathVB]::Version()

Windows常用指令

• OneDrive 删除注册表 HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace
• Create Big File (50MB) fsutil file createnew test.txt 52428800
• Create Big File (5GB) [System.IO.Path]::GetTempFileName() | % { [System.IO.File]::Create($_).SetLength(5gb).Close;$_ } | ? { $_ }
• nvidia experience 下载目录 C:\ProgramData\NVIDIA Corporation\Downloader

• Powershll prompt

  notepad $PROFILE
  function prompt {"~: "}
  function prompt { "PS " + $( Get-Location | split-path -leaf ) + ": " }
  

• WSL

  wsl --shutdown
  wsl --export <Distro> <FileName>
  wsl --import <Distro> <InstallLocation> <FileName> [Options]
  wsl --distribution, -d <Distro>
  wsl --set-default, -s <Distro>
  # \HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Lxss DefaultUid Dec 1000
  

Linux

• apt proxy

  sudo nano  /etc/apt/apt.conf
  Acquire::http::Proxy "http://:@192.168.199.229:7890";
  Acquire::https::Proxy "http://:@192.168.199.229:7890";
  

• gem install proxy

  sudo gem install -p http://127.0.0.1:7890 github-linguist
  

Python

• 水平速度、落地夹角已知，求下落速度

  math.tan(math.radians(10))
  

ImageMagick

sudo apt install imagemagick
sudo vi /etc/ImageMagick-6/policy.xml
convert *.png -quality 90 *.jpg
convert *.jpg mydoc.pdf

ffmpeg

• 合并视频&音频

  ffmpeg -i video.mp4 -i audio.wav -c copy output.mkv
  

• Cut

  # from to
  ffmpeg -i input.mp4 -ss 00:05:10 -to 00:15:30 -c:v copy -c:a copy output2.mp4
  # duration
  ffmpeg -i input.mp4 -ss 00:05:20 -t 00:10:00 -c:v copy -c:a copy output1.mp4
  

draw.io

• config for image size

  {
  "maxImageSize": "10000",
  "maxImageBytes": "30000000"
  }