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ppoffice /
Last active March 1, 2024 23:49
Install Visual Studio Code (actually code-server) on Android
  1. Install Termux, an Android terminal emulator that provides a Linux execution environment and various tools.

  2. Update system packages in Termux:

    $ pkg update -y
ppoffice /
Last active February 23, 2024 15:55
A step by step guide to upgrade webview on an old Android Emulator


  1. emulator (30.3.5) (via Android SDK)
  2. adb (30.0.5) (via Android SDK)
  3. apktool (2.5.0) and Java runtime
  4. zip (3.0)
  5. unzip (6.0)

Make sure you have JAVA_HOME and ANDROID_HOME environment variables correctly set.

ppoffice / xstartup
Last active February 19, 2024 23:30
VNC xstartup for Ubuntu Desktop (Gnome)
View xstartup
[ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup
[ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources
vncconfig -iconic &
export DESKTOP_SESSION=/usr/share/xsessions/ubuntu.desktop
export XDG_DATA_DIRS=/usr/share/ubuntu:/usr/local/share/:/usr/share/:/var/lib/snapd/desktop
dbus-launch --exit-with-session /usr/bin/gnome-session --systemd --session=ubuntu
ppoffice /
Last active December 19, 2023 18:13
Textbook/RAW RSA & RSA with OAEP+SHA1+MGF1 Python Implementation
from typing import Tuple
import pyasn1.codec.der.encoder
import pyasn1.type.univ
import base64
import rsa
def private_key_pem(n: int, e: int, d: int, p: int, q: int, dP: int, dQ: int, qInv: int) -> str:
'''Create a private key PEM file
ppoffice /
Last active September 11, 2023 00:55
LXC for Android 9.0.0 r18 Goldfish

Steps to build Android kernel and system for LXC:

  1. Download Android SDK, NDK, system and kernel source code;
  2. Download modified lxc and libcap source code (ppoffiec/lxc-android, ppoffice/libcap-android)
  3. Build Android system from source first so that we can link to its shared library when we build lxc (or maybe we don't have to);
  4. Modify Android kernel config and make sure lxc-checkconfig does not report any missing features. Then build kernel;
  5. Modify Android system/core/rootdir/init.rc according to init.rc.diff. Make sure you mount all the cgroup subsystems needed (cpu, cpuacct, cpuset, memory, pids, devices, freezer, blkio) under /sys/fs/cgruop, otherwise lxc won't find them;
  6. Rebuilt the Android system image so that the modified init.rc is in the image;
  7. Fire up the emulator with custom kernel (emulator -kernel kernel-file-path) and use adb shell and dmesg to check if everything is doing ok.
ppoffice /
Last active March 14, 2023 23:44
LG Nexus 5 Ubuntu Xfce4 Desktop with X11 fbdev and evdev
# recompile kernel first with patch:
git clone \
-b marshmallow-mr1-release \
git clone \
-b android-msm-hammerhead-3.4-marshmallow-mr1 \
git clone ~/mkbootimg
cd ~/msm
ppoffice /
Last active March 14, 2023 23:44
Minimal Linux Build Script
# Modified from ivandavidov/minimal-linux-script
# This script includes a dynamic linked busybox, openssl, python and
# network support
set -ex
View gist:2706b5e4448e8a3638c974e64c88c2ad
# Get Pre-reqs
apt-get install libattr1-dev git unzip make gcc automake pkg-config
# Get Android NDK
cd /root
mkdir -p build && cd build
wget -O /tmp/
unzip /tmp/ -d /root/build
# Set paths
ppoffice /
Last active September 2, 2022 19:20
Backup Linux using tar
cd /
tar -cvpzf backup.tar.gz \
--exclude=/backup.tar.gz \
--exclude=/proc \
--exclude=/tmp \
--exclude=/mnt \
--exclude=/dev \
--exclude=/sys \
--exclude=/run \
ppoffice /
Last active October 2, 2021 16:28
How to setup a Mirai testbed


  • CNC Server: (cnc.local:23)
  • Report Server: (cnc.local:48101)
  • Loader Server:
  • Bot Binary Host:*

Hosts Setup