rluserman: Introduction and Notation

 
 1.1 Introduction to Line Editing
 ================================
 
 The following paragraphs describe the notation used to represent
 keystrokes.
 
    The text 'C-k' is read as 'Control-K' and describes the character
 produced when the <k> key is pressed while the Control key is depressed.
 
    The text 'M-k' is read as 'Meta-K' and describes the character
 produced when the Meta key (if you have one) is depressed, and the <k>
 key is pressed.  The Meta key is labeled <ALT> on many keyboards.  On
 keyboards with two keys labeled <ALT> (usually to either side of the
 space bar), the <ALT> on the left side is generally set to work as a
 Meta key.  The <ALT> key on the right may also be configured to work as
 a Meta key or may be configured as some other modifier, such as a
 Compose key for typing accented characters.
 
    If you do not have a Meta or <ALT> key, or another key working as a
 Meta key, the identical keystroke can be generated by typing <ESC>
 _first_, and then typing <k>.  Either process is known as "metafying"
 the <k> key.
 
    The text 'M-C-k' is read as 'Meta-Control-k' and describes the
 character produced by "metafying" 'C-k'.
 
    In addition, several keys have their own names.  Specifically, <DEL>,
 <ESC>, <LFD>, <SPC>, <RET>, and <TAB> all stand for themselves when seen
 in this text, or in an init file (⇒Readline Init File).  If your
 keyboard lacks a <LFD> key, typing <C-j> will produce the desired
 character.  The <RET> key may be labeled <Return> or <Enter> on some
 keyboards.