Tech Rescue

Hector Perez

Generate SSH Keys in Linux (Fedora 35)

RSA The simplest way is to execute the following command: ssh-keygen -t rsa This is how the whole process looks like in console. Please note that I did override the default key-pair location. [terminator@fedora ~]$ ssh-keygen -t rsa Generating public/private rsa key pair. Enter file in which to save

Things to do after installing Fedora 35

1. Update DNF config sudo nano /etc/dnf/dnf.conf Append this: fastestmirror=True max_parallel_downloads=10 defaultyes=True Save and exit 2. Update the system sudo dnf update 3. Enable RPM Fusion sudo dnf install https://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-$(rpm -E %fedora).noarch.rpm sudo

Authorize a user to authenticate with SSH key

NOTE: I am assuming that sshd is already up and running on your Skynet server. If not, run systemctl status sshd, if down you can run systemctl start sshd and systemctl enable sshd to start the service and allow it to run at system startup. For the purposes of this

DecK

1. Installation options: * MacOS: brew tap kong/deck brew install deck * Linux: Alternative download / install options are available here: https://github.com/kong/deck/releases curl -sL https://github.com/kong/deck/releases/download/v1.8.1/deck_1.8.1_linux_amd64.tar.gz -o deck.tar.gz tar

Install DecK for Kong in Ubuntu 20.04 (focal)

1. Download the TAR file: curl -sL https://github.com/kong/deck/releases/download/v1.11.0/deck_1.11.0_linux_amd64.tar.gz -o deck.tar.gz 2. Extract the TAR file: tar -xf deck.tar.gz -C /tmp 3. Copy the files to the right place: sudo

Scramble string N times in Node.JS

Scramble string N times in Node.JS

let myStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz\\\""; function scramble(str, times) { str = Buffer.from(str, 'utf8'); console.log(str + " >>>----> " + str.length + " chars"); for (let i = 1; i <= times; i++) { let orig = Math.floor(Math.random() * str.length); let dest = Math.floor(Math.random() * str.length); let temp = str[orig]; str[orig] = str[dest]

Generate UUID-like strings with Crypto in Node.JS

Generate UUID-like strings with Crypto in Node.JS

const crypto = require('crypto'); let uuidStyleStr = crypto.randomBytes(4).toString('hex') + "-" + crypto.randomBytes(2).toString('hex') + "-" + crypto.randomBytes(2).toString('hex') + "-" + crypto.randomBytes(2).toString('hex') + "-" + crypto.randomBytes(6).toString('hex'); console.log(uuidStyleStr); Sample output: b99c8dbc-1258-a348-3046-1674613bd86a