![]() ![]() menuentry " ubuntu-20.04.2.0-desktop-amd64.Just in case this will help anyone else, as I always forget how to do this, even though its been explained to me more that once (thanks to those patient enough). In this file, we can add custom entries to the GRUB boot menu.Ĭopy and paste the following text at the end of this file. The first line of this file is #! /bin/sh indicating it’s a shell script. Then open up a terminal window and edit the /etc/grub.d/40_custom file with a command-line text editor like Nano. Log in to a computer running Linux and download an Ubuntu ISO image file. However, if you use UEFI, then you should disable secure boot in the firmware for GRUB2 to boot ISO files, otherwise, you might see the “can not find command loopback” error. The following instructions work on both the traditional BIOS and the newer UEFI firmware. To use GRUB2 to boot ISO files, you need a Linux distro with GRUB2 as the boot loader already installed on your computer. You can load ISO images over the network by using the TFTP protocol. GRUB2 can read files directly from LVM and RAID devices.GRUB2 supports many file systems, including but not limited to ext4, HFS+, and NTFS, which means you can put your ISO file on any of these file systems.Many Linux distributions can be booted directly from an ISO file. GRUB Legacy (version 0.x) doesn’t have this feature. ![]() It can boot Linux ISO image files stored on the hard drive without a USB or DVD. ![]() GRUB2 ( GRand Unified Bootloader) is the standard boot loader for Linux. But what if you don’t have an optical disk or USB thumb drive around, or your computer does not support burning ISO images to an optical disk? You can do it with graphical tools or from the command line. Normally you need to create a live DVD or live USB in order to boot Linux ISO images. This tutorial will be showing you how to boot ISO files stored on your hard drive with the GRUB2 boot loader. ![]()
0 Comments
![]() ![]() TP-Link’s MIPS 14-pin EJTAG Interface Source: MIPS Technologies Inc.Īs a reminder, the reason that we are using OpenOCD and GDB (GNU Project debugger) is because the J-Link does not have a Qualcomm-Atheros configuration built in. We use this pinout to connect the Segger J-Link, which is a full-featured JTAG debugger that is compatible with OpenOCD. ![]() Previously, we verified the MIPS EJTAG 14 pinout for the device and identified the 5 primary signals: TCK, TMS, TDO, TDI and TRST (test reset input). We continue our work on the TP-Link Archer C7 | AC1750 dual band wireless router. If you haven’t already, make sure to check out our previous JTAG posts: in part 1 we provide background on JTAG and in part 2 we share a teardown of a TP-Link AC1750 to demonstrate how to identify and verify a pinout for JTAG. We walk through Open On-Chip Debugger (OpenOCD) and GDB (GNU project debugger), demonstrate how to read and write from memory, and more broadly discuss the impacts of an exposed JTAG interface on production devices. Welcome back to our introduction to hardware hacking 101 and the final installment of the JTAG blog post series! In this post we cover how to communicate with a target device via JTAG once the pinout has been identified. ![]() |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |