The editing mode and command mode of VIM tool

First, enter the editing mode
1, according to large I positioning the beginning of the big line to edit
2. Press small I to edit by the line where the cursor is located
3, press big A from the end of the line to edit
4, press small A from the current character after editing
5. Press large o to insert a new line on the upstream of the current line
6. Press small o to insert a new row in the current line

Second, the command mode

/w look backwards from behind the cursor, press N to continue looking backwards, and vice versa Shift+n
W from the cursor backwards, press N to continue searching, and vice versa Shift+n
: 1,100s/will/riven/g (S-Replace, G-Global, do not G replaces only the first of each line) from line 1th to line 100, replace all would with riven
: 1, $s/will/riven/g replace all
: 1, $s #/etc/ethers#riven#g you want to replace the string with a/,
: wq! Force Save exit
: q! Force exit
: Set NU Displays the number of rows
: Set Nonu does not display the number of rows
: Nohl not highlighted
: X Save exit. (If the file does not change, it will not modify the file's Mtime)
: Wq Save exit changes the file's Mtime,

The editing mode and command mode of VIM tool