Now some mobile forensic tools take advantage of Checkra1n to jailbreak iDevices. If something goes wrong, those mobile forensic tools fail to jailbreak, what will you do? Will you just give up easily? No, all you have to do is to run Checkra1n on your own.
Checkra1n supports more than one platform. If you don‘t have a Mac, don‘t worry a Linux box will do. You could get a PC or laptop to install Linux and download Checkra1n CLI version. Connect the iPhone you‘d like to jailbreak and take a look if it shows up in system log.
Don‘t forget to make Checkra1n exectuable by chmod +x and also grant root permission.
Most important of all, Checkra1n will detect your iPhone and tell you this model is supported for jailbreaking or not.
Follow steps as below to enter Recovery mode.
Next we need to enter DFU mode. It‘s a little complicated. Don‘t be nervous Checkra1n will count down for you. Just follow the instructions below and you will know it‘s just a piece of cake.
Remember to keep on pressing [HOME] button until you see "Booting..." as below, then you could release [HOME] button.
Now take a look at your iPhone and you will see how Checkra1n is expoliting for you.
What if you do not see any message as above screenshot? You may miss something ,but don‘t worry ,just try to run Checkra1n again and you won‘t miss it.
原文：https://www.cnblogs.com/pieces0310/p/14814876.html