Mastering Linux Security and Hardening
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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: "Download the installation .iso files for Ubuntu Server 18.04, CentOS 7, and CentOS 8."

A block of code is set as follows:

//Unattended-Upgrade::Automatic-Reboot "false";
Unattended-Upgrade::Automatic-Reboot "true";

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

sudo apt update
sudo apt dist-upgrade

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: "Spend some time perusing the Common Vulnerabilities and Exposures database, and you'll soon see why it's so important to keep your systems updated."

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