The defaults are in man bash, along with details as to what each command does. See BroSlow's answer if you have changed your key bindings.

   Commands for Moving

       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 composed of alphanumeric characters (letters and digits).

       shell-forward-word

              Move forward to the end of the next word.  Words are delimited by non-quoted shell metacharacters.

       shell-backward-word

              Move back to the start of the current or previous word.  Words are delimited by non-quoted shell metacharacters.

       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.

...

       reverse-search-history (C-r)

              Search backward starting at the current line and moving `up' through the history as necessary.  This is an incremental search.

...

       unix-line-discard (C-u)

              Kill backward from point to the beginning of the line.  The killed text is saved on the kill-ring.

...

       yank (C-y)

          Yank the top of the kill ring into the buffer at point.

EDIT

These commands are all in a contiguous section of the manual, so you can browse it from Commands for Moving. Alternatively, you can save this entire section to a text file with

man bash | awk '/^   Commands for Moving$/{print_this=1} /^   Programmable Completion$/{print_this=0} print_this==1{sub(/^   /,""); print}' > bash_commands.txt

(N.B. this prints the whole section, including commands with no default keyboard shortcut.)

Explanation of awk code

• On the (only) occurrence of Commands for Moving, set the variable print_this to 1.


• On the (only) occurrence of Programmable Completion, which is the following section, set the variable to 0.


• If the variable is 1, then get rid of the leading whitespace (three spaces), and print the line.