Conventions used

There are a number of text conventions used throughout this book.

Code in text: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "One of the most well-known disk backup commands is the dd command."

A block of code is set as follows:

(parted) print
Error: /dev/sda: unrecognised disk label
Model: ATA ST1000LM048-2E71 (scsi)
Disk /dev/sda: 1000GB
Sector size (logical/physical): 512B/4096B
Partition Table: unknown 

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

exit
sudo unmount /mnt

Any command-line input or output is written as follows:

man vmstat

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Select the Try Ubuntu option from the window on the screen."

Tips or important notes

Appear like this.