Beginning of macOS and Linux dotfiles separation and quality improvements

MacOS/README.md

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+## MacOS Commands (built-in)
+
+**Password-protected Zip:** 
+```sh
+zip -e protected.zip /file/to/protect/
+```
+
+**Remove dotfiles:** 
+```sh
+dot_clean .
+```
+
+**Show all files in finder:** 
+```sh
+defaults write com.apple.Finder AppleShowAllFiles 1
+```
+
+**Search using Spotlight:** 
+```sh
+mdfind "file name”
+```
+
+**Rebuild Spotlight index:** 
+```sh
+mdutil -E
+```
+
+**Turn off Spotlight indexing:** 
+```sh
+dutil -i off
+```
+
+**Repair Disk permissions:** 
+```sh
+sudo /usr/libexec/repair_packages --repair --standard-pkgs --volume /
+```
+
+**Generate SHA-1 digest of a file:** 
+```sh
+/usr/bin/openssl sha1 download.dmg
+```
+
+**Disable sleep temporarily:** 
+```sh
+caffeinate
+```
+
+**Open multiple instances of a program:** 
+```sh
+open multiple instances open -n /Applications/Safari.app/
+```
+
+**Check network speed:** 
+```sh
+networkQuality
+```
+
+**Convert files (txt, html, rtf, rtfd, doc, docx):** 
+```sh
+textutil -convert html journal.doc
+```