Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "We have seen the SRC_URI variable in our recipe."

A block of code is set as follows:

do_<taskname>() {
  :
}

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

# cp /usr/src/asterisk-addons/configs/cdr_mysql.conf.sample
     /etc/asterisk/cdr_mysql.conf

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "Choose Save setup as dfl to avoid reconfiguring every time and choose Exit to go to minicom."

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.