Shulou(Shulou.com)06/02 Report--

1. Directory pwd: displays the full directory name

Cd: enter the current user's home directory

Cd.. / (cd..): return to the directory one level above

Cd -: returns the last operation

Cd ~: home directory

Cd / tmp: switch to the specified directory (press the tab key once to automatically complete and print all relevant information twice)

Clear: # clear screen

two。 View file or folder ls # displays the file name and folder name under the current directory

Ls-a # View all files and folders, including hidden files, hidden files to. The beginning

Ls-l # to view the details of files and folders (including creation time, permissions, size, etc.), abbreviated as ll

Ll-d # View folders and folder information (including creation time, permissions, size, etc.), excluding names

Ll-h # view the information of files and folders, the difference from ll is that the file size is expressed in k

Du-sh # View file and folder sizes

Ll-t (- rt) # sort by the time the file was created (in reverse order)

Note: ll-h is ls-lh is the actual size of the file

Du-sh shows the block size occupied by the file; block defaults to 4k.

3. View the contents of the file cat file name # View the contents of the file (not suitable for reading large files)

More file name # View the contents of the file, display it as a page, and turn the page with the spacebar

Tail file name # directly view the contents at the end of the file

Tail-n file name # View the contents of the last n lines of the file

Tail-f file name # View the contents of the file

Tail-F file name # View the contents of the file

Note: F is to monitor all the time. After the file is moved, a new file with the same name will continue to check its contents.

4. Create directory (mkdir) mkdir filename # create directory (folder)

Mkdir filename1 filename2 # create two directories

Mkdir-p / XXX/xxx/:# creates a multi-level directory

5. Create a file (touch echo) touch file # create an empty file

Echo "123" > > aa.txt # append 123s when creating aa.txt, > to add after emptying

Vi xxx.sh # create a script file

6. Delete directory (rmdir) rmdir directory name # Delete a directory (empty directory)

7. Delete file (rm) rm file name # Delete a file

# rm abc

Rm: remove regular empty file `abc'? Y

Rm-r-recursive recursive deletion

Rm-f is forcibly deleted without prompt

Rm-rf force recursive deletion

Rm-rf * # Delete all the contents of the current folder (use with caution! )

8. Copy file (cp) cp copy copy

9. Move or rename a file (mv) mv move move

10. Overlay and append

>: overwrite the contents of the file >: append the contents of the file (added at the last) 11. Output and Import (echo) echo "123": print 123

Echo "123" > File name: overwrite the contents of the file to 123

Echo "123" > > File name: append 123 to the end of the file

twelve。 Help command (man help) man command: view the help information of the command (details), ctrl+z exit view

Command-help: view help information for a command

Edit mode and command mode of vivi

Edit mode: finish editing the text.

Command mode: realize the operation of the file.

Trailing mode: after entering command mode using esc, when saving the file or exiting, enter trailing mode first and use shift+:.

Vi filename: enter command mode, use "A", "a", "O", "o", "I", "I" keys, and switch to edit mode

A: add text at the end of the current cursor line

A: adds text after the character of the current cursor

I: insert text at the beginning of the current cursor

I: insert text before the character of the current cursor

O: inserts a line of space before the line of the current cursor

O: inserts a space after the line of the current cursor.

Operation in command mode

Gg: the cursor stops at the first line, the first character.

G: the cursor stops at the last line, the first character.

Dd: cut one line of the cursor

DG: delete the line of the cursor, that is, all the lines below

Ndd (number + dd): cut n lines below the cursor

D: cut from the location of the cursor to the end of the line

P: paste

Yy: copy a row

Nyy (number + yy): copy the n lines below the cursor

The shift+$: cursor moves to the last character of the line.

Operation in trailing mode

Wq: execute the save exit operation in command mode

W: perform save operation in command mode

Q: in command mode, execute the exit vi operation

Q! In command mode, perform a forced exit vi operation

Wqstores: force save + exit.

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