Characters called CTRL-X, where X is any letter, are entered by holding down the CTRL (or CTL, or CONTROL) key and pressing that letter. Although we give the letter in uppercase, you can press the letter without the SHIFT key.
Other special characters are LINEFEED (which is the same as CTRL-J), BACKSPACE (same as CTRL-H), ESC, TAB, and DEL (sometimes labeled DELETE or RUBOUT).
This book uses the following font conventions:
is used for UNIX filenames, commands not built into the shell, (which are files anyway), and shell functions. Italic is also used for dummy parameters that should be replaced with an actual value, to distinguish the vi and emacs programs from their Korn-shell modes, and to highlight special terms the first time they are defined.
is used for Korn shell built-in commands, aliases, variables, and options, as well as command lines when they are within regular text. Bold is used for all elements typed in by the user.
is used in examples to show the contents of files or the output from commands.
is used in examples to show interaction between the user and
the shell; any text the user types in is shown in
$ pwd /users/billr/ora/kb $
is used in displayed command lines for dummy parameters that should be replaced with an actual value.
is used in Chapter 2 to show the position of the cursor on the command line being edited. For example:
grep -l Bob < ~pete/wk/names