bash: Readline Bare Essentials

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1 8.2.1 Readline Bare Essentials
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1 In order to enter characters into the line, simply type them.  The typed
1 character appears where the cursor was, and then the cursor moves one
1 space to the right.  If you mistype a character, you can use your erase
1 character to back up and delete the mistyped character.
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1    Sometimes you may mistype a character, and not notice the error until
1 you have typed several other characters.  In that case, you can type
1 'C-b' to move the cursor to the left, and then correct your mistake.
1 Afterwards, you can move the cursor to the right with 'C-f'.
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1    When you add text in the middle of a line, you will notice that
1 characters to the right of the cursor are 'pushed over' to make room for
1 the text that you have inserted.  Likewise, when you delete text behind
1 the cursor, characters to the right of the cursor are 'pulled back' to
1 fill in the blank space created by the removal of the text.  A list of
1 the bare essentials for editing the text of an input line follows.
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1 'C-b'
1      Move back one character.
1 'C-f'
1      Move forward one character.
1 <DEL> or <Backspace>
1      Delete the character to the left of the cursor.
1 'C-d'
1      Delete the character underneath the cursor.
1 Printing characters
1      Insert the character into the line at the cursor.
1 'C-_' or 'C-x C-u'
1      Undo the last editing command.  You can undo all the way back to an
1      empty line.
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1 (Depending on your configuration, the <Backspace> key be set to delete
1 the character to the left of the cursor and the <DEL> key set to delete
1 the character underneath the cursor, like 'C-d', rather than the
1 character to the left of the cursor.)
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