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alias c='clear'
alias update="sudo apt update -y"
alias upgrade="sudo apt upgrade -y"
alias remove="sudo apt autoremove -y"
alias install="sudo apt install -y"
alias fix="sudo apt -f install"
alias restart="sudo systemctl restart"
alias enable="sudo systemctl enable"
alias disable="sudo systemctl disable"
alias start="sudo systemctl start"

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https://www.exratione.com/2014/05/a-mailserver-on-ubuntu-1404-postfix-dovecot-mysql/


Ex
Ratione
GitHub • Consulting • Blog • Archives • Feed
A Mailserver on Ubuntu 14.04: Postfix, Dovecot, MySQL
By Reason May 1, 2014 Permalink

This long post contains a recipe for building a reasonably secure Ubuntu 14.04 mail server in Amazon Web Services, using Postfix, Dovecot, and MySQL, with anti-spam packages in the form of amavisd-new, Clam AntiVirus, SpamAssassin, and Postgrey. Local users are virtual rather than being system users. Administration of users and domains is achieved through the Postfix Admin web interface. Webmail is provided by Roundcube.

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Linux Configuration

By: Sagar Chamling

First Upgrade

sudo apt update
sudo apt upgrade

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#!/bin/bash
#easy openvpn server setup for ubuntu

read -p "port (1-65535): " PORT
read -p "protocol (udp or tcp): " PROTOCOL
read -p "encrypt (y or n): " ENCRYPT
read -p "hmac (y or n): " HMAC
read -p "xor scramble (y or n): " SCRAMBLE
read -p "compress (y or n): " COMPRESS_YN
read -p "network number (0-255): " NETWORK_NUM

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Introduction

• C-a == Ctrl-a
• M-a == Alt-a

General

:q        close
:w        write/saves
:wa[!]    write/save all windows [force]
:wq       write/save and close

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Referências

Projetos RogerioPradoJ

https://github.com/rogeriopradoj/tuto-botman-laravel-starter

https://github.com/CadeOLeo/CadeOLeoBot

Framework PHP

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#!/usr/bin/env bash
set -eu

# mark a few packages as explicitly installed
mark-wanted() {
  apt install -y \
    bash git tmux vim htop \
    unattended-upgrades \
    software-properties-common;
}

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security and hardening options for systemd service units

A common and reliable pattern in service unit files is thus:

NoNewPrivileges=yes
PrivateTmp=yes
PrivateDevices=yes
DevicePolicy=closed
ProtectSystem=strict

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Debian Sid server setup cheatsheet

1. Generate an SSH key on your local machine (if you don't have one already):

ssh-keygen -t rsa -b 4096 -C "My key"

2. Copy the public key:

cat ~/.ssh/id_rsa.pub

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Ubuntu Notes

# Change shells
$ chsh -s $(which bash|zsh)