The way of Learning (V): Three statement structures, VIM editor shortcut keys and how to use the Find command

Cycle
For
While
Until

             for 变量 in 列表； do                   循环体             done

E.g for I in ' seq 1 $FILE '; Do
echo "Hello, ' head-n $I/etc/passwd | Tail-1 | Cut-d ', '-f1,7 ' "
Done

  Vim Editor: Edit mode input mode last line mode edit-Input: 1. Open file: vim+ #2. close file: ZZ3. Move cursor: H left L right J down K move in Word: W moves to the next word                                                                                                                     E jumps to the current or next word ending                                            b jumps to the current or previous word ending                                            Line jump: o Absolute Line end Inline jump: #G跳转至第 # line G jumps to the last line  

4. Flip screen: ctral +f PAGE Down
   +b. Up one page
   5. Delete a single character d
      X: Delete single character at cursor location
      #x: Delete # a single character
      #dw: Delete # Group of words
      DD: Delete the current cursor in the row
      6. In the last line mode:
      . Indicates when to move forward
      $ last line
      + #向下的 # line
      7. Paste command: P copy entire line content to below
      P Copy entire line contents to top
      8. Copy command: yy current line copy
      9. First delete and then enter: C
      10. Replace: R replaces a single character
      R Replacement Mode
      11. Undo Operation: U
      #u撤销 # Operations
      12 split screen display: Ctrl+w,s Horizontal splitter window
      Ctrl+w,v Vertical splitter window
      ctrl+w,↑↓←→ Switch window
      13 Interacting with the shell:! Command

The way of Learning (V): Three statement structures, VIM editor shortcut keys and how to use the Find command