HOW TO TEST USB DEVICE IS CONNECTED WITH UBUNTU/DEBIAN/LINUX

1. I have a problem with connection of my android to laptop with an usb cable. I assume the problem is with cable but I have to check
2. Tool $ dmesg // It is some kind of log from the kernel
3. I’ve connected my Android via usb but dmesg showed nothing
4. $ lsinput // Doesn’t shows my USB devives, but shows inputs for the kernel.
5. $ udevadm monitor --udev // It is usefull. But it doesn’t even react on my phone probably phone's usb just broken
6. $ lsusb // list all devices.html
7. $ ls /dev/sd* to check usb storage (for android seems to doesn’t work).

HOW TO CREATE BOOTABLE USB IN UBUNTU

1. Use Startup Disk Creator app