我正在尝试在vim中找出映射命令的语法，例如onoremap。
特别是，我对手册中的这一行感到困惑，关于<C-U>的使用：
CTRL-U（
<C-U>）用于删除Vim可能插入的范围。
有人可以解释一下吗？
答案 0 :(得分：38)
这不是onoremap命令语法的一部分，它解释了特定映射的作用。该映射是：
onoremap <silent> F :<C-U>normal! 0f(hviw<CR>
因此，当运算符挂起时使用F键时，vim会将其替换为onoremap命令的下一个参数中的位。首先是:开始ex模式命令。如果在使用映射时存在可视选择，则vim将自动插入范围'<,'>，以便以下ex命令将应用于视觉选择，使命令行看起来像：
:'<,'>
映射中的<C-U>告诉vim在输入:之后，应该使用 Control + U 组合来清除命令线，消除自动插入的范围，使命令行看起来像：
:
然后使用映射的其余部分。
您可以通过使用 V 开始逐行视觉选择，然后：开始输入命令来自行查看。范围将显示，然后您可以使用 Control + U 来清除它，就像示例映射一样。
包含该映射的vim帮助部分解释了其余部分。
答案 1 :(得分：0)
Ctrl-U Vim-map与终端命令行中的快捷键相同。检查：https://www.howtogeek.com/howto/ubuntu/keyboard-shortcuts-for-bash-command-shell-for-ubuntu-debian-suse-redhat-linux-etc/
避免重新映射其中的少数（例如在终端上中断进程），但是可以重新映射大多数（例如Ctr-A或Ctrl-X）。 如果您的VIM不是终端机（例如gVim），则可以不加考虑地重新映射它们。
顺便说一句：Ctrl-Shift-Letter就像VIM终端的Ctrl-Letter映射。
某些终端快捷方式：
" copy-paste
" <C-S-c> copy
" <C-S-v> paste (or replace visual selected)
" manage running processes
" <C-c> break out of a command or process on a terminal. This will stop a running program immediately.
" <C-z> send a running program in the background
" <C-d> If you are using an SSH connection, it will be closed. If you are using a terminal directly, it will be closed
" control what appears on the screen
" <C-l> clear terminal screen
" <C-s> Stop all output to the screen. This is particularly useful when running commands with a lot of long, verbose output, but you don’t want to stop the command itself with Ctrl+C.
" <C-q> Resume output to the screen after stopping it with Ctrl+S.
" Moving the Cursor
" <C-a> or Home: move cursor to beginning of line
" <C-e> or End: "" end ""
" <C-xx> Move between the beginning of the line and the current position of the cursor. This allows you to press Ctrl+XX to return to the start of the line, change something, and then press Ctrl+XX to go back to your original cursor position. To use this shortcut, hold the Ctrl key and tap the X key twice.
" <A-b> go left 1 word
" <C-b> "" char (like left-arrow)
" <A-f> go right 1 word
" <C-f> "" char (like right-arrow)
" Cutting and Pasting
" <C-u> erases everything from the current cursor position to the beginning of the line
" <C-k> erases everything from the current cursor position to the end of the line
" <C-w> erase the word preceding to the cursor position. If the cursor is on a word itself, it will erase all letters from the cursor position to the beginning of the word.
" <C-y> paste the erased text that you saw with Ctrl + W, Ctrl + U and Ctrl + K shortcuts
" Deleting Text
" <C-d> or Delete: Delete the character under the cursor
" <A-d> Delete all characters after the cursor on the current line.
" <C-h> Backspace: Delete the character before the cursor.
" Fixing Typos
" <A-t> Swap the current word with the previous word.
" <C-t> Swap the last two characters before the cursor with each other. You can use this to quickly fix typos when you type two characters in the wrong order.
" <C-_> Undo your last key press. You can repeat this to undo multiple times.
" Capitalizing Char
" <A-u> Capitalize every character from the cursor to the end of the current word
" <A-l> Uncapitalize every character from the cursor to the end of the current word
" <A-c> Capitalize the character under the cursor. Your cursor will move to the end of the current word.
" Command History
" <C-p> like up-arrow: press it repeatedly to keep on going back in the command history
" <C-n> like down-arrow: use this shortcut in conjugation with Ctrl+P. Ctrl+N displays the next command
" <A-r> revert any changes to a command you’ve pulled from your history if you’ve edited it.
" <C-r> search in your command history. Just press Ctrl+R and start typing. If you want to see more commands for the same string, just keep pressing Ctrl + R.
" <C-o> Run a command you found with Ctrl+R
" <C-g> Leave history searching mode without running a command