## 3.2.1 For Linux Users

Instructions in this section show operation examples for all the actions required to complete installation. $>$ on the line head indicates a command prompt. The bold and the italic letters in the operation example indicate inputs from a user and a message from the system, respectively. In the following example, $>$ in the first line indicates a command prompt.

> echo Hello World!
Hello World!


Note that the prompt is displayed in different ways (e.g. %, \$) according to operating environments. The bold letters that come after the prompt in the first line are the letters entered by the user. In the above example, the seventeen letters of echo Hello World! are the letters entered by the user. Press the enter key at the end of line. The italic letters in the second line are the output from the system, which are displayed as pressing the enter key at the end of the first line. Some parts of inputs from the user and message from the system contain version and release numbers. Those contained in the actual messages are of the actual software that a user installs. Moreover, messages from the system shown in the operation examples differ depending on the presence of libraries, which are available as options. Even if the message texts are not completely identical to those shown in this manual, the user may proceed with the operation unless an error message appears.

For Ubuntu Ubuntu 12.04 users can install from the package. First, add the HARK repository to your system. The following web page describes how to do this: HARK installation instructions

Then, install the package using the following commands:

> sudo apt-get update
> sudo apt-get install install harkfd harktool4 julius-4.2.2-hark-plugin


If you are using other environments, you need compile from the source code. See the HARK installation instructions to get the source code.