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@chattama
chattama / gist:3508370
Created August 29, 2012 08:12
archlinux makepkg on ubuntu
sudo aptitude install libarchive-dev bsdtar
git clone git://projects.archlinux.org/pacman.git
cd pacman
./autogen.sh
./configure --disable-doc
make
sudo make install
@rofl0r
rofl0r / init.c
Created August 6, 2013 21:15
minimal init daemon by rich felker, author of musl libc
#define _XOPEN_SOURCE 700
#include <signal.h>
#include <unistd.h>
int main()
{
sigset_t set;
int status;
if (getpid() != 1) return 1;
@dergachev
dergachev / setuid-root-backdoor.md
Last active May 24, 2024 13:43
How to use setuid to install a root backdoor.

Why You Can't Un-Root a Compromised Machine

Let's say somebody temporarily got root access to your system, whether because you "temporarily" gave them sudo rights, they guessed your password, or any other way. Even if you can disable their original method of accessing root, there's an infinite number of dirty tricks they can use to easily get it back in the future.

While the obvious tricks are easy to spot, like adding an entry to /root/.ssh/authorized_keys, or creating a new user, potentially via running malware, or via a cron job. I recently came across a rather subtle one that doesn't require changing any code, but instead exploits a standard feature of Linux user permissions system called setuid to subtly allow them to execute a root shell from any user account from the system (including www-data, which you might not even know if compromised).

If the "setuid bit" (or flag, or permission mode) is set for executable, the operating system will run not as the cur

@sameersbn
sameersbn / gitlab.conf
Created February 6, 2015 09:53
Nginx reverse proxy configuration for GitLab
upstream gitlab {
server 172.17.42.1:10080 fail_timeout=0;
}
# let gitlab deal with the redirection
server {
listen 80;
server_name git.example.com;
server_tokens off;
root /dev/null;
@mrkpatchaa
mrkpatchaa / README.md
Last active June 6, 2024 21:03
Bulk delete github repos

Use this trick to bulk delete your old repos or old forks

(Inspired by https://medium.com/@icanhazedit/clean-up-unused-github-rpositories-c2549294ee45#.3hwv4nxv5)

  1. Open in a new tab all to-be-deleted github repositores (Use the mouse’s middle click or Ctrl + Click) https://github.com/username?tab=repositories

  2. Use one tab https://chrome.google.com/webstore/detail/onetab/chphlpgkkbolifaimnlloiipkdnihall to shorten them to a list.

  3. Save that list to some path

  4. The list should be in the form of “ur_username\repo_name” per line. Use regex search (Sublime text could help). Search for ' |.*' and replace by empty.

@camilstaps
camilstaps / WritingPseudocode.md
Last active March 31, 2023 02:13
How to write good pseudocode

How to write good Pseudocode

This is an unfinished list of remarks on how to write good pseudocode.

What is pseudocode?

Pseudocode is a loosely defined way of transmitting the concept of an algorithm from a writer to a reader. Central is the efficiency of this communication, not the interpretability of the code by an automated program (e.g., a parser).

#!/bin/sh
# view here:
# https://i.stack.imgur.com/OK3po.png
e=$'\e['
for n in {0..7}; do
printf "${e}"'38;05;'"${n}"'m%-6s' '('"$n"') '
done
# note - excludes __ and _ items
['author',
'contributors',
'coordinates',
'created_at',
'destroy',
'entities',
'favorite',
'favorite_count',
'favorited',
@diffficult
diffficult / installing_virt_manager.md
Last active June 1, 2024 13:53
Easy instructions to get virt-manager qemuv/kvm running on Arch

Easy instructions to get QEMU/KVM and virt-manager up and running on Arch

  1. Make sure your cpu support kvm with below command:

     grep -E "(vmx|svm)" --color=always /proc/cpuinfo
    
  2. Make sure BIOS have enable “Virtualization Technology”.

  3. User access to /dev/kvm so add your account into kvm(78) group:

@Dhanvesh
Dhanvesh / Win10Activation.txt
Created June 5, 2018 17:37
Windows 10 Activation Batch File
@echo off
title Windows 10 ALL version activator&cls&echo ************************************&echo Supported products:&echo - Windows 10 Home&echo - Windows 10 Professional&echo - Windows 10 Enterprise, Enterprise LTSB&echo - Windows 10 Education&echo.&echo.&echo ************************************ &echo Windows 10 activation...
cscript //nologo c:\windows\system32\slmgr.vbs /ipk TX9XD-98N7V-6WMQ6-BX7FG-H8Q99 >nul
cscript //nologo c:\windows\system32\slmgr.vbs /ipk 3KHY7-WNT83-DGQKR-F7HPR-844BM >nul
cscript //nologo c:\windows\system32\slmgr.vbs /ipk 7HNRX-D7KGG-3K4RQ-4WPJ4-YTDFH >nul
cscript //nologo c:\windows\system32\slmgr.vbs /ipk PVMJN-6DFY6-9CCP6-7BKTT-D3WVR >nul
cscript //nologo c:\windows\system32\slmgr.vbs /ipk W269N-WFGWX-YVC9B-4J6C9-T83GX >nul
cscript //nologo c:\windows\system32\slmgr.vbs /ipk MH37W-N47XK-V7XM9-C7227-GCQG9 >nul
cscript //nologo c:\windows\system32\slmgr.vbs /ipk NW6C2-QMPVW-D7KKK-3GKT6-VCFB2 >nul