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The following typographic and usage conventions occur in this text:
Table 1. Typographic and usage conventions
|"Quoted text"||Quotes from people, quoted computer output.|
|Literal computer input and output captured from the terminal, usually rendered with a light grey background.|
|command||Name of a command that can be entered on the command line.|
| ||Name of a variable or pointer to content of a variable, as in |
| ||Option to a command, as in "the |
| ||Argument to a command, as in "read man |
| || User prompt, usually followed by a command that you type in a terminal window, like in |
|Command synopsis or general usage, on a separated line.|
| ||Name of a file or directory, for example "Change to
|Key||Keys to hit on the keyboard, such as "type Q to quit".|
|Graphical button to click, like thebutton.|
|->||Choice to select from a graphical menu, for instance: "Select -> in your browser."|
|Terminology||Important term or concept: "The Linux kernel is the heart of the system."|
|The backslash in a terminal view or command synopsis indicates an unfinished line. In other words, if you see a long command that is cut into multiple lines, \ means "Don't press Enter yet!"|
|See Chapter 1||link to related subject within this guide.|
|The author||Clickable link to an external web resource.|
The following images are used:
|This is a note|
It contains additional information or remarks.
|This is a caution|
It means be careful.
|This is a warning|
Be very careful.
|This is a tip|
Tips and tricks.