CMD命令 chmod 666/777/744 的含义

参考链接：http://superuser.com/questions/295591/what-is-the-meaning-of-chmod-666

Chmod change attributes from a file/folder

• chmod 666 means that all users can read and write but cannot execute
• chmod 777 allows all actions for all users

• chmod 744 allows only owner to do all actions; group and other users are allowed only to read

  permission to:  owner      group      other     
                  /¯¯¯\      /¯¯¯\      /¯¯¯\
  octal:            6          6          6
  binary:         1 1 0      1 1 0      1 1 0
  what to permit: r w x      r w x      r w x
  
  binary         - 1: enabled, 0: disabled
  
  what to permit - r: read, w: write, x: execute
  
  permission to  - owner: the user that create the file/folder
                   group: the users from group that owner is member
                   other: all other users