Specific Linux commands:
1.who: Displays information about users logged into the system; Tty7 graphical interface; user logon time
2.PWD: the current path; 1./: The location representing the start of the file system
2. Path: A string representing a file or directory
3.ls: View the file or sub-directory information of the specified target directory;
Common options:-L (Long) to display list details as a list
-a displays all files and folders (files at the beginning of the point are hidden)
ls+la+ Relative path: view
4. Path: 1. Absolute path: The path that begins with the root is the absolute path;
Example: Absolute path:/home/tarena/aid0801/
2. Relative path: A path that does not begin with a root is a relative route.
. : Current Folder
.. : Parent folder (directory)
~: Household directory (/home/tarena)
(shortcut key) 1.ctrl+c terminate this command; ctrl+l,clear clear screen
2. Adjust the terminal font: ctrl+shift+ plus to enlarge;
Zoom out: Ctrl + MINUS sign;
Ctrl+alt+enter, exit full screen;
Launch terminal: Exit;
Shutdown: Init 0/reboot/shutdown-n new
Restart: Init 6 abort command run: Ctrl + C
5.CD: Switch working directory/enter into a directory;
CD directory name (the directory name can be an absolute path/relative path)
Example: CD. : Default back:/home/tarena back to User home directory
Example 2:CD-: Switch back and forth in the last two directories visited.
6.mkdir: Create one/More folders
Command format: mkdir option command name folder 1 folder 2 and so on
Example: mkdir a b C
Common options:-P option to create multiple directories recursively (created directly if the middle folder does not exist)
Touch: Create one or more files (touch filename 1 filename 2 filename 3 ....) ）
Cat: View file contents; Format: Cat file name.
RM Delete (remove abbreviation) is the function of deleting one or more files or folders;
Common Options-r: Delete files and folders (contains all the contents of the folder)
-F: Force delete, without giving any hint
-I: Prompt before deletion (yes means y,no = N)
Note: Use this command with caution in a production environment: RM-RF
Delete all Files
(Do not delete files with absolute path) RM-RF: File/filename
Skill class: 1. Be good at using TAB key to auto-complement
2. Historical order
In the terminal window can be used, the next key to find the command has been executed
3.history
！ Sequence number--execute command
1. Wildcard characters:Match any number of characters (all)
？ Match an arbitrary character; example: ls
. TXT view all files ending in txt
RM-RF. txt delete all files ending with. txt
2.linux Chinese text editor Vim/vi (equivalent to Notepad in Windows)
1. Format: VI file name
2. How to edit: Vim three modes of Operation 1. Normal mode (mode to enter after starting)
2. Insert mode (text can be edited in this mode)
3. Command-line mode
3. Text-Writing steps:
1.VI file name
2. Normal mode? Insert mode
A: Insert to the right of the current cursor
I: Insert in front of the current cursor
O: The next line of the current cursor is inserted
3. Press ESC with insert mode to switch to normal mode
4. Normal mode switch to command line mode shift+:
5. Under command line, enter the following: W save; Wq: Save and exit;
Q: Do not save the exit; q! forced exit
"YY": the line where the cursor is copied; 5YY copy 5 rows
P: Paste to the next line where the cursor is located
DD: Delete/cut cursor line: 7DD
U: Fallback
Copy: CP: Copy files or directories used
Format: Copy file CP source file destination file
Copy directory cp-r directory 1 directory 2
MV Action 1. Clipping: MV file name 1 path/{file name 2}
Mv file name 1 path/{directory name 2}
function 2 rename; format mv file name 1 file name 2 (file)
MV Directory name 1 directory Name 2
Cat: View File contents
Format: Cat file name; example: CAT/ETC/PASSWD;
MORE: Split screen view file contents
Common actions: SPACEBAR: Turn to the next screen
Enter: Turn to the next line to display
Format: More ETC/PASSWD
Linux Common commands
