gnu readline

many cli apps use libreadline Bash, GDB, Python REPL, sqlite3

Movement

Shortcut (Emacs)	Action
Ctrl + a	Move to the beginning of the line
Ctrl + e	Move to the end of the line
Ctrl + f	Move forward one character (equivalent to `Right Arrow`)
Ctrl + b	Move backward one character (equivalent to `Left Arrow`)
Alt + f	Move forward one word
Alt + b	Move backward one word
Ctrl + x, Ctrl + x	Toggle cursor position between current location and start of line

Shortcut (Emacs)	Action
`Ctrl + d`	Delete character under the cursor (or exit shell on empty line)
`Backspace` / `Ctrl + h`	Delete character before the cursor
`Alt + Backspace`	Delete word before the cursor
`Alt + d`	Delete word after the cursor
`Ctrl + k`	Cut (kill) text from cursor to end of line
`Ctrl + u`	Cut (kill) text from cursor to beginning of line
`Ctrl + w`	Cut (kill) previous whitespace-delimited word
`Alt + \`	Delete all spaces/tabs around the cursor
`Ctrl + y`	Paste (yank) top item from the kill ring
`Alt + y`	Cycle through previous items in the kill ring (after pressing `Ctrl + y`)

Shortcut (Emacs)	Action
Ctrl + r	Incremental backward search through command history
Ctrl + s	Incremental forward search (may require `stty -ixon` to disable flow control)
Ctrl + p	Move to previous history entry (Up Arrow)
Ctrl + n	Move to next history entry (Down Arrow)
`Alt + .` or `Alt + _`	Insert last argument of previous command
Alt + <	Move to first entry in history
Alt + >	Move to last entry in history

Shortcut (Emacs)	Action
Tab	Autocomplete command/path
Alt + ?	List possible completions without expanding
Alt + *	Insert all possible completions directly onto the command line
Ctrl + l	Clear terminal screen (preserves current line input)
Ctrl + t	Transpose (swap) character under cursor with preceding character
Alt + t	Transpose (swap) word under cursor with preceding word
Alt + u	Uppercase word from cursor to end of word
Alt + l	Lowercase word from cursor to end of word
Alt + c	Capitalize character at cursor and move to end of word
`Ctrl + _` or `Ctrl + x, Ctrl + u`	Undo last editing action

config

~/.inputrc

set completion-ignore-case on

set completion-map-case on

set show-all-if-ambiguous on

set colored-stats on

set visible-stats on

set completion-query-items 200

set bell-style none

set horizontal-scroll-mode off

"\e[A": history-search-backward

"\e[B": history-search-forward

src

https://tiswww.case.edu/php/chet/readline/rltop.html