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1. :$

直接敲$, 是当前行的末尾

$  or 
   
                 To the end of the line.  When a count is given also go                                                                                                [count - 1] lines downward. inclusive motion.                                                                                                         In Visual mode the cursor goes to just after the last                                                                                                 character in the line.
   

前面加数字,  比如3$, 就是到该行下面第三行的末尾。

而:$ 

help :$$               the last line in the file                 :$

是到文件的末尾,  等价于G操作 (gg为文件头)

2. :%

比如替换命令时,

:%s/AAA/aaa/g

是全局将AAA替换成aaa。

help % - 

9. Various motions                              various-motions                                                                                                                                                                                                                                                                                                       %                                                                                              %                       Find the next item in this line after or under the                                                                                                     cursor and jump to its match. inclusive motion.

看不出啥意思

help :% 看下

Line numbers may be specified with:             :range E14 {address}                                                                                          {number}        an absolute line number                                                                                                               .               the current line                          :.                                                                                          $               the last line in the file                 :$                                                                                          %               equal to 1,$ (the entire file)            :%

即:%  相当于 :1,$, 即从第1行到最后一行

:%s/AAA/aaa/g 等价于 :1,$s/AAA/aaa/g

末尾的/g什么意思, help文档不太好看, 代表一行中的每一个...

3. :%!

有时使用:%!xxd

:%!xxd -r等命令

:%为全局操作,

:{range}![!]{filter} [!][arg]                           :range!                                                                                                              Filter {range} lines through the external program                                                                                                    {filter}.

加个!为调用第三方程序,

是的xxd不是vim内嵌的软件,

man xxd看下

XXD(1)                                                       General Commands Manual                                                       XXD(1)NAME       xxd - make a hexdump or do the reverse.

xxd是将text转换为hex 16进制格式...

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