====== سرآغاز ======
  
  * Unix philosophy: Do One Thing and Do It Well (DOTADIW)
  * How deep is deep enough
  * Style is made of certain conscious choices
  * Issues: Speed(Google), Concentration(Questions), Boundaries(Sysadmin, DevOps, Programmer)
  * Note-taking: Zettelkasten, Second Brain, Obsidian, TiddlyWiki, DokuWiki
  * Muscle memory
  * Dynamic syllabus
  * Linux is a family of open-source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991, by Linus Torvalds
  * https://distrowatch.com : Debian/Ubuntu/RedHat/CentOS/Fedora/ArchLinux/Manjaroi/Mint/Kali/Slackware
  * http://lxer.com : Linux News