Please install a suitable OS Ubuntu version for your Jetpack installation. Aetina FAQ
Please download the SDK manager to be ready for SDK components installation. SDK Manager
Please update your host PC using the command "apt update".
Regarding Jetson platform installation will ask for more necessary tools/libraries/kits...etc, so, please use the below command to install it.
sudo apt-get install binutils libxml2-utils liblz4-tool python qemu-user-static
Some of them may be different, it depends on the Ubuntu version(18/20/22), please adjust as you need.