prompter: How can I use checkra1n?
assistant: checkra1n is a jailbreak tool that allows you to gain access to the root file system of your iOS device. Here are the general steps to use checkra1n:

1. Download the latest version of checkra1n from the official website.

2. Connect your iOS device to your computer via USB.

3. Open checkra1n on your computer and click "Start".

4. Follow the on-screen instructions to put your iOS device into DFU mode.

5. Once your device is in DFU mode, checkra1n will start the jailbreak process. Wait for the process to complete.

6. Once the jailbreak is complete, you can install Cydia, a package manager for jailbroken iOS devices, to download and install tweaks and customizations.

7. Disconnect your device and reboot it.

It's important to note that jailbreaking your iOS device can be risky and may void your device's warranty. It's also possible to cause instability and security issues on your device. Be sure to backup your data before attempting to jailbreak your device and proceed at your own risk.
prompter: Provide some examples of why someone would need to jailbreak their device. 
Also, explain what jailbreaking a device means as well as why it voids your warranty.
It would also be cool to know what the jailbreaker was actually doing during the jailbreak process.
Can you provide some insight into that?
assistant: In short, jailbreaking is the action of bypassing the manufacturer's restrictions on the software of a device. This can refer to bypassing the restrictions on any device but is most commonly talked about in relation to iOS devices. Since you mentioned checkra1n, I will focus on iOS.  
Here are some of the most common reasons that people choose to jailbreak there devices:  
1. Installing apps not in the App Store. Apple has a very stringent review process that prevents many types of apps from appearing on their store. For example emulators of classic game consoles are not allowed. However, these apps can be easily installed on a jailbroken device.
2. Customizing the look and feel of their device. There are many tweaks available that allow users of jailbroken devices to modify the look and feel of their devices to a far greater extent than Apple officially supports.
3. Philosophical preference for Free Software. Many people prize having full control of their devices. They see it as a fundamental right to run whatever code they want on the devices they own.

There is some ongoing debate on the legality of denying warranty service to someone who has jailbroken their device. In theory, it should only void your warranty if it was the direct cause of hardware issues. For example if you installed a jailbreak that allowed you to modify the animations on your device, the manufacturer should not be able to deny you warranty coverage if your camera fails. However, in practice manufactures will often use the jailbreak as an excuse to deny coverage. So it is best to jailbreak under the assumption that you will no longer be under any warranty.  
The checkra1n jailbreak is based on  the checkm8 exploit. This exploit works due to an issue in the bootrom allowing arbitrary code execution. Let me know if you are interested in more details.