Linux Command Line Editing
Linux command line editing actions: readling, moving, editing, killing/yanking, completing, and so on.
readline#
The GNU Readline Library: Library for command-line editing
在 BASH(1) 的 man page 输入 /^READLINE（^ 为 vim 中的行首字元位置），可搜索 READLINE 相关的说明（the READLINE section of the bash(1) man page）。
This is the library that handles reading input when using an interactive shell, unless the --noediting option is given at shell invocation. Line editing is also used when using the -e option to the read builtin.
By default, the line editing commands are similar to those of Emacs. A vi-style line editing interface is also available.
Line editing can be enabled at any time using the -o emacs or -o vi options to the set builtin.
Moving#
BASH(1) 的 man page 中输入 /Commands for Moving 即可定位到对应章节。
beginning-of-line (C-a)
Move to the start of the current line.
end-of-line (C-e)
Move to the end of the line.
forward-char (C-f)
Move forward a character.
backward-char (C-b)
Move back a character.
forward-word (M-f)
Move forward to the end of the next word. Words are composed of
alphanumeric characters (letters and digits).
backward-word (M-b)
Move back to the start of the current or previous word. Words are com-
posed of alphanumeric characters (letters and digits).
clear-screen (C-l)
Clear the screen leaving the current line at the top of the screen.
With an argument, refresh the current line without clearing the screen.
redraw-current-line
Refresh the current line.
<C-l>：滚动屏幕将当前行置顶，同 clear 命令。不清除缓冲区，可继续下拉滚动翻看过往记录。
<C-b>/<C-f>（←/→）：按字符为单位移动<M-b>/<M-f>（⌥+←/→）：按单词为单位移动<C-a>/<C-e>：定位句首/尾
Editing#
BASH(1) 的 man page 中输入 /Commands for Changing Text 即可定位到对应章节。
delete-char (C-d)
Delete the character at point. If this function is bound to the same character as the tty EOF character, as C-d commonly is, see above for the effects.
C-h：delete char backward（向左回删一个字符）.C-d：delete-char (forward)（向右删除一个字符）.
Killing and Yanking#
BASH(1) 的 man page 中输入 /Killing and Yanking 即可定位到对应章节。
kill-line (C-k)
Kill the text from point to the end of the line.
backward-kill-line (C-x Rubout)
Kill backward to the beginning of the line.
unix-line-discard (C-u)
Kill backward from point to the beginning of the line. The killed text is saved on the kill-ring.
kill-whole-line
Kill all characters on the current line, no matter where point is.
kill-word (M-d)
Kill from point to the end of the current word, or if between words, to the end of the next word. Word boundaries are the same as those used by for ward-word.
backward-kill-word (M-Rubout)
Kill the word behind point. Word boundaries are the same as those used by backward-word.
shell-kill-word
Kill from point to the end of the current word, or if between words, to the end of the next word. Word boundaries are the same as those used by shell-forward-word.
shell-backward-kill-word
Kill the word behind point. Word boundaries are the same as those used by shell-backward-word.
unix-word-rubout (C-w)
Kill the word behind point, using white space as a word boundary. The killed text is saved on the kill-ring.
yank (C-y)
Yank the top of the kill ring into the buffer at point.
yank-pop (M-y)
Rotate the kill ring, and yank the new top. Only works following yank or yank-pop.
C-w/M-delete(backspace)，向后（backward）删除至单词开头；M-d：向前（forward）删除至单词末尾；C-u：删除至行首（raspbian/CentOS） or 删除整行（macOS）；C-k：删除至行末；
<C-y>：召回（yank）粘贴 <C-w>、<M-d>、<C-u>、<C-k> 剪切删除（kill）的文本。
Completing#
complete (TAB)
possible-completions (M-?)
possible-filename-completions (C-x /)
possible-variable-completions (C-x $)
Keyboard Macros#
BASH(1) 的 man page 中输入 /Keyboard Macros 即可定位到对应章节。