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: “After running the setup script, run sudo gvm-check-setup for validation of the installation and default configuration.”

A block of code is set as follows:

{
      "v": "1",
      "type": {
        "name": "pipeline_rule",
        "version": "1"
      },

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

{
      "v": "1",
      "type": {
        "name": "pipeline_rule",
        "version": "1"
      },

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

    sudo systemctl enable graylog-server.service
    sudo systemctl start graylog-server.service
sudo systemctl --type=service --state=active | grep graylog

Bold: Indicates a new term, an important word, or words that you see onscreen. For instance, words in menus or dialog boxes appear in bold. Here is an example: “Cryptography is the science of, and some even say the art of, using deception and mathematics to hide data from unwanted access.”

Tips or important notes

Appear like this.