This manual uses several conventions to highlight certain words and phrases and draw attention to specific pieces of information.
Mono-spaced with non-white background¶
Used to highlight system input, including shell commands, file names and paths. Also used to highlight keycaps and key combinations. For example:
To see the contents of the file
my_next_bestselling_novelin your current working directory, enter the
cat my_next_bestselling_novelcommand at the shell prompt and press
Enterto execute the command.
The above includes a filename, a shell command and a keycap, all present in mono-spaced type and all distinguishable thanks to context.
Key combinations can be distinguished from keycaps by the hyphen connecting each part of a key combinations. For example:
Enterto execute the command.
Ctrl-Alt-F2to switch to the first virtual terminal. Press
Ctrl-Alt-F1to return to your X-Windows session.
The first paragraph highlights the particular keycap to press. The second highlights two key combinations (each a set of three keycaps with each set pressed simultaneously).
If source code is discussed, class names, methods, functions, variable names and returned values mentioned within a paragraph will be presented as above, in
mono-spaced type. For example:
File-related classes include
filesystemfor file systems,
filefor files, and
dirfor directories. Each class has its own associated set of permissions.
This denotes words or phrases encountered on a system, including application names; dialog box text; labelled buttons; check-box and radio button labels; menu titles and sub-menu titles. For example:
Choose System -> Preferences -> Mouse from the main menu bar to launch Mouse Preferences. In the Buttons tab, click the Left-handed mouse check box and click Close to switch the primary mouse button from the left to the right (making the mouse suitable for use in the left hand).
The addition of italics indicates replaceable or variable text. Italics denotes text you do not input literally or displayed text that changes depending on circumstance. For example:
To connect to a remote machine using ssh, type
ssh *email@example.com*at a shell prompt. If the remote machine is example.com and your username on that machine is john, type
mount -o remount *file-system*command remounts the named file system. For example, to remount the
/homefile system, the command is
mount -o remount /home.
To see the version of a currently installed package, use the
rpm -q *package*command. It will return a result as follows: package-version-release.
Note the words in bold italics above — username, domain.name, file-system, package, version and release. Each word is a placeholder, either for text you enter when issuing a command or for text displayed by the system.
Aside from standard usage for presenting the title of a work, italics denotes the first use of a new and important term. For example:
Publican is a DocBook publishing system.
Terminal output and source code listings are set off visually from the surrounding text.
Output sent to a terminal is presented thus:
books Desktop documentation drafts mss photos stuff svn books_tests Desktop1 downloads images notes scripts svgs
Source-code listings are also presented this way but may add syntax highlighting.
Notes and Warnings¶
Finally, we use three visual styles to draw attention to information that might otherwise be overlooked.
Notes are tips, shortcuts, or alternative approaches to the task at hand. Ignoring a note should have no negative consequences, but you might miss out on a trick that makes your life easier.
Important boxes detail things that are easily missed: configuration changes that only apply to the current session, or services that need restarting before an update will apply. Ignoring a box labelled 'Important' will not cause data loss but may cause irritation and frustration.
Warnings should not be ignored. Ignoring warnings will most likely cause data loss.