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

Code words in text are shown as follows: "Due to Tomcat 7's support for web fragments, developers now don't need to implement the specific library configurations for their application web.xml."

A block of code is set as follows:

# .bash_profile
# Get the aliases and functions
if [ -f ~/.bashrc ];then
. ~/.bashrc
fi
# User specific environment and start-up programs
JAVA_HOME=/opt/jdk1.6.0_24
PATH=$JAVA_HOME/bin:$PATH:$HOME/bin
export PATH JAVA_HOME
unset USERNAME

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

<Executor name="tomcatThreadPool
"namePrefix="catalina-exec-"
maxThreads="150"
minSpareThreads="4"/>

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

[root@localhost opt]# cksum apache-tomcat-7.0.12.zip

New terms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in the text like this: "The previous screenshot shows the packages which are available in md5, and by clicking on md5 on the website, we can compare the checksum generated in our system with the value given on the site."