alexolinux

Create virtual environment in Python

1. Check if venv module is installed

python -m venv --help

If venv is not available, we might need to install python3-venv

alexolinux

#!/bin/bash

FFMPEG_URL="https://github.com/nwjs-ffmpeg-prebuilt/nwjs-ffmpeg-prebuilt/releases/download"
FFMPEG_VER="0.93.0"
ARCH="x64"
OPERA_LIB="/usr/lib/x86_64-linux-gnu/opera/lib_extra"
TMP_DIR="/tmp/operalib"

if [ -f "${OPERA_LIB}/libffmpeg.so" ]; then
    echo "libffmpeg.so already exists in ${OPERA_LIB}. Exiting."

alexolinux

#!/bin/bash

# -- ------------------------------------------------------------------------------------------------
# Author: alexolinux
# This script to install and configure a Kubernetes cluster with control-plane and nodes.
# -- ------------------------------------------------------------------------------------------------
# https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/create-cluster-kubeadm/
# https://kubernetes.io/docs/tasks/administer-cluster/kubeadm/kubeadm-upgrade/
# -- ------------------------------------------------------------------------------------------------

alexolinux

#!/bin/bash

# Detect RHEL version
if [ -f /etc/os-release ]; then
    . /etc/os-release
    RHEL_VERSION=$(echo $VERSION_ID | cut -d '.' -f1)
else
    echo "Unable to determine OS version."
    exit 1
fi

alexolinux

TMUX: Elevate Your Terminal Experience

---

Session Management:

• Start TMUX Session: tmux new
• Start TMUX Named session: tmux new -s <NAME>
• Start TMUX Named detached session: tmux new -s <NAME> -d
• Kill session: tmux kill-session -t <NAME>
• Kill ALL sessions: tmux kill-server

alexolinux

PyEnv

---

Manage python versions

List Available Python Versions

pyenv install --list

alexolinux

cntlm-proxy

---

Usage:

• To set the proxy, use: proxy set
• To unset the proxy, use: proxy unset

RHEL

alexolinux

Consul Installation

---

sudo yum install yum-utils
sudo yum-config-manager --add-repo https://rpm.releases.hashicorp.com/RHEL/hashicorp.repo
sudo yum install consul

Running consul as dev (single mode)

alexolinux

#!/bin/bash

NODE="kube-node-02"

kubectl cordon $NODE
kubectl drain $NODE --ignore-daemonsets --delete-emptydir-data
kubectl delete node $NODE

alexolinux

#!/bin/bash

sudo yum update -y
sudo yum install -y httpd
sudo yum install -y git

export TOKEN=`curl -X PUT "http://169.254.169.254/latest/api/token" -H "X-aws-ec2-metadata-token-ttl-seconds: 21600"`
export META_INST_ID=`curl http://169.254.169.254/latest/meta-data/instance-id -H "X-aws-ec2-metadata-token: $TOKEN"`
export META_INST_TYPE=`curl http://169.254.169.254/latest/meta-data/instance-type -H "X-aws-ec2-metadata-token: $TOKEN"`
export META_INST_AZ=`curl http://169.254.169.254/latest/meta-data/placement/availability-zone -H "X-aws-ec2-metadata-token: $TOKEN"`