目录

• Universal
  • screen
  • ffmpeg
• MacOS
• Linux
• Windows

Universal

screen

• 终止所有已有 sessions

  screen -ls | awk '{print substr($0, 1, index($0, ".pts-") - 1)}'| xargs -I {} screen - {} -X quit
• tldr

  - Start a new screen session:
  screen
  - Start a new named screen session:
      screen -S session_name
  - Start a new daemon and log the output to `screenlog.x`:
      screen -dmLS session_name command
  - Show open screen sessions:
      screen -ls
  - Reattach to an open screen:
      screen -r session_name
  - Detach from inside a screen:
      Ctrl + A, D
  - Kill the current screen session:
      Ctrl + A, K
  - Kill a detached screen:
      screen -X -S session_name quit

ffmpeg

# 视频两倍速
ffmpeg -i test.mp4 -filter:v "setpts=0.5*PTS" out.mp4

# 音频两倍速
ffmpeg -i test.mp4 -filter:a  "atempo=2.0" -vn out.mp4
# 都两倍速
ffmpeg -i test.mp4 -filter_complex "[0:v]setpts=0.5*PTS[v];[0:a]atempo=2.0[a]" -map "[v]" -map "[a]" out.mp4

# 生成gif动图
ffmpeg -i input.mp4 -vf "scale=1080:-1" -r 15 output.gif
# -r 帧率
# -vf 画幅

MacOS

• IOS Bundle Identifier 给予权限

  sudo sqlite3 ~/Library/Application\ Support/com.apple.TCC/TCC.db "INSERT or REPLACE INTO access VALUES('kTCCServiceMicrophone','com.apple.Terminal',0,0,4,1,NULL,NULL,0,'UNUSED',NULL,0,1622199671);"
• quarantine

  sudo spctl --master-disable
  sudo xattr -r -d com.apple.quarantine xxx.dmg

Linux

Add User

Take user git as example:

apt install git
groupadd git
useradd git -g git
passwd git
cd home
mkdir -p git/repos
cd git/repos
git init --bare minifemm.git
chown -R git:git /home/git

Windows