CLI

1. How to get the CPU name
   sysctl -a | grep machdep.cpu.brand_string

2. How to get system info
   system_profiler SPSoftwareDataType SPHardwareDataType

3. Collection #1: https://switowski.com/blog/favorite-cli-tools

4. Collection #2: from here

   1. bat is cat with syntax highlighting and line numbers
   2. diff-so-fancy shows best-looking diffs you'll ever see
   3. fx is the best JSON viewer you'll ever use
   4. fzf is an insanely fast fuzzy search written in @golang
   5. exa is ls but with coloring
   6. duff shows a better du summary
   7. htop is a modern top replacement
   8. hexyl is a beautiful hex viewer
   9. @fig is next-gen autocompletion

5. restart from terminal
   sudo shutdown -r now

6. sudo with no password

   sudo visudo
   ...
   <username> ALL=(ALL) NOPASSWD:ALL
   

   If one wants to just increase the time before re-entering the sudo password, add

   Defaults    timestamp_timeout=3
   

7. update command line tools

   sudo xcode-select -s /Applications/Xcode_13.2.1.app
   sudo rm -rf /Library/Developer/CommandLineTools
   sudo xcode-select --install
   softwareupdate --all --install --force
   

   Note: this leaves the popup open in the GUI...

8. Create a build agent like those on Github

   https://github.com/actions/virtual-environments/issues/1783 https://github.com/actions/virtual-environments/blob/main/images/macos/templates/macOS-12.json

9. Check which process is listening to which port

   sudo lsof -nP -i4TCP:$POST | grep LISTEN
   

10. Follow the end of a log (e.g. mongo)

    tail -f /opt/homebrew/var/log/mongodb/mongo.log
    

11. access the keychain from cli. In the command $USER refer to the current user keychain source

    # store environment variable
    security add-generic-password -a "$USER" -s 'name_of_your_key' -w 'passphrase'
    # retrieve key to environment variable
    security find-generic-password -a "$USER" -s 'name_of_your_key' -w
    # store it locally
    NAME_OF_YOUR_KEY=$(security find-generic-password -a "$USER" -s "name_of_your_key" -w)
    # or
    NAME_OF_YOUR_KEY=`security find-generic-password -a "$USER" -s 'name_of_your_key' -w`
    

12. Debug startup time in the terminal

    Write all steps in the file trace

    PS4='+%D{%s.%9.}:%N:%i>' zsh -c -i -x exit > trace 2>&1
    

    Make times differential

    <trace awk -F: '{printf "+%.09f", $1 - t; t=$1; $1=""; print}'
    

13. Prevent word wrap: tput rmam

14. Restore word wrap: tput smam

15. Timing shell commands: set -x, disabling it: set +x

16. get process that has a port open sudo lsof -nP -i4TCP:$PORT | grep LISTEN

17. force macOS to sync time: sudo sntp -sS time.apple.com