(Office) Notepad _Linux common directory command

       Reference is still Silicon Valley Grain Institute: http: //www.gulixueyuan.com/course/300/task/7078/show# (free view, very comprehensive curriculum, using a mobile phone on the line.)

     

1 . [Root @ localhost ~ ]
 1.1 .Root currently logged on user
 1.2 . @ No special meaning
 1.3 .localhost short hostname of the current system
 1.4 . ~ Represents the current directory
 1.5 . # Prompt, # is the superuser, the average user is $
 2 .hostname: current host name
 3 .ls   
 3.1 role:. ls command displays the contents of the specified working directory (list the files contained in the current working directory and subdirectories).
3.2 . Syntax: LS [- alrtAFR] [name ...]
 3.3 Parameters:.
     -A displays all files and directories (ls default file name or directory name begins with " . " Are considered hidden files are not listed )
     - L except the file name, file type will also, permissions, owner, file size and other information detailing
     - r file will display in the reverse order (originally in alphabetical order)
     - t file according to the established time priorities listed
    With -A -a, but not listed " . " (Current directory), and " .. " (parent directory)
     -F file names listed after adding a symbol; then add executable e.g. , " * " , directory then add " / " 
    - R & lt If there is a file directory, the following are listed in order of file Yi Jie 
    LS - how many display k lh. 
    LS --color = Never (color is not displayed), Auto Auto, always (total color display ) 
    LS   -l / the root /   
 . 4 .cd command: switch directories
 4.1 absolute and relative paths. 
      absolute path: from the root directory to find a level 
      relative path: reference, such as the current position usr /
 4.2 .cd -    and back to the root directory cd 
     cd - . Contents of the last representatives of
 5.mkdir command to create the directory.
 5.1 -. the p-parameter, ensure that the directory name exists, create one does not exist, L may mkdir
 6 delete the directory .rmdir command.
 7 .rm- the RF 123 delete, delete and could not return, no trash .
 8 .extundelete can achieve Linux file / data folder recovery. 
   can be installed, then you can use, and data recovery. 
Tip: command [options] [parameters] [] optional.