^ or Ctrl
|
Both the
^
symbol and Ctrl represent the Control (Ctrl) key on a keyboard. For example,
the key combination
^D
or
Ctrl-D means that you hold down the Control key while you
press the D key. (Keys are indicated in capital letters but are not case
sensitive.)
|
bold
font
|
Commands
and keywords and user-entered text appear in
bold
font.
|
Italic
font
|
Document
titles, new or emphasized terms, and arguments for which you supply values are
in
italic font.
|
Courier font
|
Terminal
sessions and information the system displays appear in
courier font.
|
Bold Courier font
|
Bold Courier
font indicates text that the user must enter.
|
[x]
|
Elements
in square brackets are optional.
|
...
|
An
ellipsis (three consecutive nonbolded periods without spaces) after a syntax
element indicates that the element can be repeated.
|
|
|
A vertical
line, called a pipe, indicates a choice within a set of keywords or arguments.
|
[x | y]
|
Optional
alternative keywords are grouped in brackets and separated by vertical bars.
|
{x | y}
|
Required
alternative keywords are grouped in braces and separated by vertical bars.
|
[x {y | z}]
|
Nested set
of square brackets or braces indicate optional or required choices within
optional or required elements. Braces and a vertical bar within square brackets
indicate a required choice within an optional element.
|
string
|
A
nonquoted set of characters. Do not use quotation marks around the string or
the string will include the quotation marks.
|
< >
|
Nonprinting characters such as passwords are in angle brackets.
|
[ ]
|
Default
responses to system prompts are in square brackets.
|
!, #
|
An
exclamation point (!) or a pound sign (#) at the beginning of a line of code
indicates a comment line.
|