01_vi use

1. Enter command mode to input mode:
   I: the front I: first line
   a: rear A: end of line
   o: next line O: On line
   s: delete the current character and insert mode S: delete the entire line, and the input mode
2. Input mode to command mode: esc
3. Line mode to command mode: esc

Some commands in command mode:

1. mobile:
   • h Left
   • j under
   • The k
   • l Right
   • gg: to the first line (first row)
   • 1G: move to the first row (first row)
   • nG: the first few lines, n is the number
   • G: move to the end of line
2. delete:
   • ciw delete a word and insert mode
   • yiw copy a word
   • diw delete a word
   • dd: delete a row, shear line
   • ndd: Delete n lines, n is a number (1, 2, 3 ...)
   • dG: Delete from current line to the last line
   • d1G: Deletes the current line to the first line
   • dw: Delete the current location to the end of the word
   • d ^: Delete from current character to the beginning of the line
   • d $: Delete from current character to the end of the line
   • x: Delete current character
   • 3x: delete three characters
   • s: delete the current character and enter input mode
   • S: delete the entire line, and the input mode
   • cw: delete the current position to the end of the word and enter insert mode
3. copy:
   • yy: Copy the current line
   • 3yy: Copy the three lines
4. Paste:
   • p: Paste to the next line
   • 2p: Paste 2 was repeated once, the number of times (NP)
   • P: Paste on line
5. replace:
   • r: single character replacement
   • r: single character replacement
6. Undo: u
7. Recovery: ctrl + r # sublime is ctrl + y
8. Find:
   / hello: hello look down, look forward lookup by n, N reverse lookup
   hello:? Hello look up,
9. Block operations: v / V