Unbreak4ble

Understanding the Memory Layout of Linux Executables

Required tools for playing around with memory:

• hexdump
• objdump
• readelf
• xxd
• gcore

Unbreak4ble

How to setup your own CA with OpenSSL

For educational reasons I've decided to create my own CA. Here is what I learned.

First things first

Lets get some context first.

Unbreak4ble

step 1

if you don't have this version installed, download here and install it.

step 2

execute the command line bellow on terminal.

sudo perl -pi -e 's/\x00\x85\xc0\x74\x7b\xe8/\x00\x85\xc0\xEB\x7b\xe8/g' /opt/resolve/bin/resolve

it will replace some bytes of the executable file.

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TDP and turbo parameter modification with MSR on non-overclockable CPU

Disclaimer

• MSR modification may void your CPU's (or system board's) warranty. Proceed with care. I'm not responsible for any destruction caused by this article.
• MSR address (greatly) differs from CPU to CPU. Check your own CPU's MSR address using Intel's documentation.
• Only tested on Intel i7-8550U (Kaby Lake R).
• This article is translation of this article. If you can understand Korean, I recommend reading that article, not this.

Start

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needed commands

• 7z: used to unpack iso file;
• unsquashfs: unpack squashfs file. Ex: rootfs, desktopfs, etc...;
• mksquashfs: pack folder into squashfs file;
• grub-mkrescue: used to repack folder into bootable iso file by reading files in "grub" folder and others boot files.

unpack iso file

mkdir -v iso_root
cd iso_root