# Installation on Linux

## Prerequisite

**Java 8 (or +)** must be installed, that's all.

You can check it with the command  `java -version`

## Installation

### 1) Download

With your browser go to "[**Download**](https://www.telosys.org/download/telosys-cli/index.html)" page

Choose the "Latest version" and ckick "Download" button.

A ZIP file "telosys-cli-x.x.x-xxx.zip" will be downloaded.

### 2) Unzip the file

Copy the “zip file” in the directory where you want to install Telosys.

Unzip the downloaded file :    \
    `unzip telosys-cli-x.x.x-xxx.zip`

Make the shell scripts "**`telosys`**" and "**`tt`**" executable    \
    `chmod 777 telosys`      \
    `chmod 777 tt`

### 3) Update 'PATH' environment variable

To be able to launch Telosys from any location, just add its directory to the "**PATH**".  \
    `export PATH=$PATH:/path/to/telosys-dir`

### 4) Run Telosys

Now if the PATH variable is set correctly you can launch Telosys from any directory.

Move to the directory where you want to use Telosys     \
    `cd myproject`

Launch Telosys-CLI with **`telosys`**command \
or with **`tt`** command for older versions (before version 4.2.0)


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://doc.telosys.org/telosys-cli/cli-installation-linux.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.