=====Notes=====
==Unix Philosophy==
1) Do one thing and do that one thing extremely well

2) Small is beautiful

3) Everything is a file.
  - 3 Types of Files
  - Regular/ordinary files: in Unix these are seen with ls -l as a: -
  - Directory files: in Unix these are seen with ls -l as a: d
  - Special files/device files: in Unix these are seen with ls -l as a: l
==Permissions==
ls -l -/---/---/--- information
First dash: type of file. See above.
First Group: Owner Perms.
Second Group: Group Perms.
Third Group: Global Perms.

Base 8 understanding for file Perms
  - # [letter] [what it does]
  - 4 r read
  - 2 w write
  - 1 x execute
  - 0 - nothing
==Commands we learned so far==
  - [Command] [Name] [What it does]
  - man: Manual: Gives an index of a command. Format: man [command] [options]
  - ls: list: Gives a list of all non-hidden items in the current directory. Format: ls [options]
  - cd: change directory: changes the current directory. Format: cd [directories in current directory/.. (go up one parent)/a specific directory if you know the location]
  - mv: move: (not sure what it does, man mv showed that it changes cursor location)
  - cp: copy: copy files over from one location to another. Format: cp [source] [destination]
  - mkdir: make directory: creates directories. Format: mkdir [name of new directory] (can make it in specific directories, or just in the current one)
  - echo: echo: overwrite files with written text/prints whatever you say after it. Format: echo [> (overwrite)/>> (add to) + filename] [What you wish to write]
  - cat: cat: reads targeted file. Format: cat [filename]
  - unzip: unzip: unzips .zip
  - gzip: gz unzip: removes .gz from compressed files.
  - tar: tar: extracts tar files, used like this : tar -xf (add a z to that if gz is still there, j if it's a bz2) filename
  - tr: translate: changes characters in a file from One char into another Format: tr "X" "Y"