GNU Readline Operation Reference (Bash/Emacs /...)

<Emacs_specific>
C-x C-C Exit Emacs! The most important Emacs command is :-)
</Emacs_specific>

Basic operations
C-B rollback 1 Character
C-F advances 1 Character
Del/backspace Delete characters on the left (#1)
C-d: Delete characters under the cursor
C-_/C-X c-u undo the last operation

#1: based on different configurations, the backspace key may be set to delete characters on the left of the cursor, while the Del key is the same as the c-d key to delete characters under the cursor.

Move cursor
C-a move to the beginning of the line
Move c-e to the end of the row
M-F forward a word (including numbers and letters)
M-B: Roll back a word.
C-l clears the screen and resends the current row at the top.

Killing operation
The killing operation deletes text from the current row and saves it for future pasting (yanking)
C-k deletes the remaining parts from the current position
M-D deletes the part from the cursor position to the end of the word. If the cursor is between words, the next word is deleted.
M-DEL: delete the part from the cursor position to the start of the word. If the cursor is between words, delete the previous word.
C-W deletes the part from the current position to the previous blank. Different from m-Del.

Yanking operation
C-y paste the last kill text to the cursor
M-y roll back and paste the record, and paste the new top one. The first command must be c-y or M-y.

Read Parameters
You can pass the numeric parameter to the Readline command. Format:
M-[-] digit command
Example:
M-1 0 c-d passed 10 to c-d, removing the 10 characters behind the cursor
M -- c-k pass-1 to c-k, delete the part before the cursor in the current row

Search for historical records
Two Methods: normal search and incremental search
Incremental search:
C-r searches forward (backward) in history records
C-s searches backward (forward) in history records
Repeated c-r/C-s will continue to find the next record
ESC/C-J: end the search and accept the search result as the current row.
Enter to end the search, accept the results, and execute
C-G exit the search and restore the current row

Excerpted and translated from "GNU Readline library users 'Manual"
Http://cnswww.cns.cwru.edu/php/chet/readline/rluserman.html