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Linux managing DNS servers (LPIC-2)

Quick command reference

lsb_release -d          # get Linux distro and version
cat /etc/centos-release

# ubuntu
sudo /etc/init.d/bind9 {start | stop | restart}

sudo -u bind rndc status

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###############################################################################
## Monit control file
###############################################################################
##
## Comments begin with a '#' and extend through the end of the line. Keywords
## are case insensitive. All path's MUST BE FULLY QUALIFIED, starting with '/'.
##
## Below you will find examples of some frequently used statements. For 
## information about the control file, a complete list of statements and 
## options please have a look in the monit manual.

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set alert usera@example.com

set mailserver smtp.gmail.com port 587
    username "user@gmail.com"
    password "password"
    using TLSV1
    with timeout 30 seconds

set mail-format {
    from: monit@server.example.com

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monitoring shit with monit

get monit

sudo apt-get install monit

monit configuration is in ~/.monitrc

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docker-compose cheat sheet

Reference: https://docs.docker.com/compose/compose-file/#compose-file-structure-and-examples

Collection of a few docker-compose examples which I use regularly

Instructions on using docker-compose files

# docker-compsoe version to be used must be mentioned at the top 
version: '3'
services:

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Simple automated GIT Deployment using GIT Hooks

Here are the simple steps needed to create a deployment from your local GIT repository to a server based on this in-depth tutorial.

How it works

You are developing in a working-copy on your local machine, lets say on the master branch. Most of the time, people would push code to a remote server like github.com or gitlab.com and pull or export it to a production server. Or you use a service like deepl.io to act upon a Web-Hook that's triggered that service.

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#Dig HowTo [https://www.madboa.com/geek/dig/]

# get the address(es) for yahoo.com
dig yahoo.com A +noall +answer

# get a list of yahoo's mail servers
dig yahoo.com MX +noall +answer

# get a list of DNS servers authoritative for yahoo.com
dig yahoo.com NS +noall +answer

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ZSH=$HOME/.oh-my-zsh


plugins=(git ruby rails sublime web-search)

ZSH=$HOME/.oh-my-zsh
source $ZSH/oh-my-zsh.sh

# Customize to your needs...

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# FreeAgent puts the powerline style in zsh !

if [ "$POWERLINE_DATE_FORMAT" = "" ]; then
  POWERLINE_DATE_FORMAT=%D{%Y-%m-%d}
fi

if [ "$POWERLINE_RIGHT_B" = "" ]; then
  POWERLINE_RIGHT_B=%D{%H:%M:%S}
elif [ "$POWERLINE_RIGHT_B" = "none" ]; then
  POWERLINE_RIGHT_B=""

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function get_os {
    base=`uname`
    if [ $base == 'Darwin' ]; then 
        brew install zsh zsh-completions;
    elif [ $base == 'Linux' ]; then
        os=`lsb_release -i | cut -f 2-`
        if [ $os == 'Ubuntu' ]; then
            sudo apt install zsh -y;
        elif [ $os == 'Fedora' ]; then
            sudo dnf install zsh -y;