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Conventions used

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

CodeInText: 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: "The full path is more concrete and hardcoded; the interpreter will try to use the complete path. For example, /bin/ls or /usr/local/bin/myBinary.."

A block of code is set as follows:

#!/bin/bash
AGE=17
if [ ${AGE} -lt 18 ]; then
echo "You must be 18 or older to see this movie"
fi

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

rbrash@moon:~$ history
1002 ls
1003 cd ../
1004 pwd
1005 whoami
1006 history

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.

Warnings or important notes appear like this.
Tips and tricks appear like this.
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