joshenders

Flatcar Container Linux Setup Under Incus on Debian

In case you missed it, Canonical relicensed LXD under AGPLv3 in December 2023 with a mandatory CLA. The LXD project was hard forked as Incus and licensed under an Apache 2.0 License.

Incus is maintained by the same team of developers that first created LXD and is recommended for new users going forward.

Install and configure

Borrowed from here.

oleduc

#!/bin/bash

# Cores reserved for the host machine
# Must include QEMU IO/Emulation cores if configured
# Ex: 1st Core -> reserved=0
# Ex: 1st & 2nt Cores -> reserved=0,1
# Ex: 1st Physical Core (16 Virtual Cores) -> reserved=0,8
reserved=0,8

# Host core range numbered from 0 to core count - 1

joshenders

OpenWrt 23.05.x Setup Under LXD 5.x on Debian 12 with PCI Passthrough

In case you missed it, Canonical relicensed LXD under AGPLv3 in December 2023 with a mandatory CLA. The LXD project was hard forked as Incus and licensed under an Apache 2.0 License.

Incus is maintained by the same team of developers that first created LXD and is recommended for new users going forward.

If you continue with this guide using Incus, substitute incus for lxc in each command.

Install lxd via snap and configure

💡 If using Debian 12 (Bookworm) or newer, you can just apt install lxd but keep in mind this pacakge is EOL and new users are encouraged to move to Incus.

moyix

#!/bin/bash

gdb -p "$1" -batch -ex 'set {short}$rip = 0x050f' -ex 'set $rax=231' -ex 'set $rdi=0' -ex 'cont'

joshenders

Successful mitmproxy-3.7 setup tested on OS X 10.13.6 and iPhone X running 12.1.4

Enable IP forwarding and disable ICMP redirects to keep the iPad sending traffic to the proxy

sudo sysctl -w net.inet.ip.forwarding=1
sudo sysctl -w net.inet.ip.redirect=0

net.inet.ip.forwarding
Enable IP forwarding between interfaces

datagrok

This article is now published on my website: Prefer Subshells for Context.

rsms

// HTTP client for testing high connection concurrency
// Authors: Richard Jones and Rasmus Andersson
// Released in the public domain. No restrictions, no support.
#include <sys/types.h>
#include <sys/time.h>
#include <sys/queue.h>
#include <stdlib.h>
#include <err.h>
#include <event.h>
#include <evhttp.h>

catwell

Decoding Base64-URL without padding

1) Add padding

Divide the length of the input string by 4, take the remainder. If it is 2, add two = characters at the end. If it is 3, add one = character at the end.

You now have Base64-URL with padding.

2) Translate to Base64

ntamvl

Ubuntu 16 – how to increase maximum file open limit ( ulimit -n )

If you are setting up nginx,chances are you will discover your worker_connections is at some low number, such as 1024. You can’t increase this number unless you increase kernel limit as well. First of all run cat /proc/sys/fs/file-max to discover your maximum limit.

abc@ubuntu:~$ cat /proc/sys/fs/file-max
1048576
abc@ubuntu:~$ ulimit -n
1024

zcutlip

Importing Hand-Rolled C Header Files in LLDB

Scenario

• We're debugging a dylib, libhello.dylib
• The dylib is linked from hello
• The exported function is helloworld()
• We do not have source, but have reversed a struct from the library and created a hand-crafted header file

Header File