hoangdh

CVE: https://ubuntu.com/security/CVE-2023-38408

Run it

#!/bin/bash

WORK_DIR=/opt
mkdir -p /var/lib/sshd/
cp /etc/ssh/sshd_config /etc/ssh/sshd_config.bk

hoangdh

Cài đặt Jupyter qua conda

conda install -c conda-forge jupyterhub  # installs jupyterhub and proxy
conda install jupyterlab notebook  # needed if running the notebook servers in the same environment

File cấu hình

Filename: jupyterhub_config.py

hoangdh

Migrate data MongoDB to another cluster

• Source cluster: 10.10.10.10
• Destination cluster: 10.10.20.10

mongodump --host 10.10.10.10 --port 27017 --archive --numParallelCollections=10 | \
mongorestore --host 10.10.20.10 --port 27017 --archive --numParallelCollections=10 --drop

hoangdh

Install instaloader

pip3 install --user instaloader

Download all video from masukiye_bungalov channel

instaloader --post-filter="is_video" --no-video-thumbnails --no-metadata-json --filename-pattern={date_utc:%Y}/{shortcode} masukiye_bungalov

hoangdh

echo "vm.zone_reclaim_mode=0
vm.swappiness=1
vm.max_map_count=102400" >> /etc/sysctl.conf
sysctl -p /etc/sysctl.conf

apt-get install gnupg curl -y
wget http://archive.ubuntu.com/ubuntu/pool/main/o/openssl/libssl1.1_1.1.1f-1ubuntu2.20_amd64.deb -P /tmp
dpkg -i /tmp/libssl1.1_1.1.1f-1ubuntu2.20_amd64.deb && rm /tmp/libssl1.1_1.1.1f-1ubuntu2.20_amd64.deb
curl -fsSL https://pgp.mongodb.com/server-6.0.asc | gpg -o /usr/share/keyrings/mongodb-server-6.0.gpg --dearmor
echo "deb [ arch=amd64,arm64 signed-by=/usr/share/keyrings/mongodb-server-6.0.gpg ] https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/6.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-6.0.list

hoangdh

#!/bin/bash

fallocate -l 1G /swapfile; 
chmod 600 /swapfile; mkswap /swapfile; 
cp /etc/fstab /etc/fstab.bk; 
echo '/swapfile none swap sw 0 0' | sudo tee -a /etc/fstab; 
swapon -a;
sysctl vm.swappiness=15; 
sysctl vm.vfs_cache_pressure=50

hoangdh

When run apt update,

root@hadoop123:~# apt-get update
Get:5 https://repo.saltproject.io/py3/ubuntu/20.04/amd64/archive/3005 focal InRelease [2125 B]
Err:5 https://repo.saltproject.io/py3/ubuntu/20.04/amd64/archive/3005 focal InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 0E08A149DE57BFBE
Reading package lists... Done
W: GPG error: https://repo.saltproject.io/py3/ubuntu/20.04/amd64/archive/3005 focal InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 0E08A149DE57BFBE
E: The repository 'https://repo.saltproject.io/py3/ubuntu/20.04/amd64/archive/3005 focal InRelease' is not signed.

hoangdh

#!/bin/bash

if [ "$1" == "on" ]
then
	synclient TouchpadOff=0
	echo "$(date '+%F %T') - INFO: Touchpad is enabled."
elif [ "$1" == "off" ]
then
	echo "$(date '+%F %T') - INFO: Touchpad is disabled."
	synclient TouchpadOff=1

hoangdh

Fixed Log4j RCE Dec 10 2021 for Hadoop Cluster using CDH

Info:

• Code: CVE-2021-44228
• https://nvd.nist.gov/vuln/detail/CVE-2021-44228
• https://bishopfox.com/blog/log4j-zero-day-cve-2021-44228-
• Cheatsheet: https://gist.github.com/SwitHak/b66db3a06c2955a9cb71a8718970c592

Show log4j version on Namenode, Datanode, Resource Manager, NodeManager

hoangdh

Webhook Example

#!/usr/bin/python3
# -*- coding: utf-8 -*-

from flask import Flask, request

app = Flask(__name__)