Readline

C-a Move to the start of the line.
C-b Move back one character.
C-d Delete the character underneath the cursor.
C-e Move to the end of the line.
C-f Move forward one character.
C-g Abort an incremental search.
C-k Kill the text from the current cursor position to the end of the line.
C-l Clear the screen, reprinting the current line at the top.
C-r Reverse incremental search.
C-w Kill from the cursor to the previous whitespace.
C-y Yank the most recently killed text back into the buffer at the cursor.
C-_ Undo the last editing command.
M-b Move backward a word.
M-d Kill from the cursor to the end of the current word.
M-f Move forward a word, where a word is composed of letters and digits.
M-y Rotate the kill-ring, and yank the new top.