Tech Rescue

Hector Perez

How to install Z shell in Fedora 38

How to install Z shell in Fedora 38

To install: sudo dnf install zsh Output looks like this: Last metadata expiration check: 0:02:21 ago on Fri 29 Sep 2023 11:57:41 AM CEST. Dependencies resolved. ================================================================================================================================================================================================ Package Architecture Version

Install Kubernetes in Fedora

Install Kubernetes in Fedora

My environment: * VirtualBox 7.0 (Version 7.0.6 r155176 (Qt5.15.2)) * Fedora 38 .',;::::;,'. hperez@fedora .';:cccccccccccc:;,. ------------- .;cccccccccccccccccccccc;. OS: Fedora Linux 38 (Workstation Edition) x86_64 .:cccccccccccccccccccccccccc:. Host: VirtualBox 1.2 .;ccccccccccccc;.:dddl:.;ccccccc;. Kernel: 6.4.15-200.fc38.x86_64 .:ccccccccccccc;OWMKOOXMWd;ccccccc:. Uptime:

NPM Cheat-sheet

NPM Cheat-sheet

Update NPM version npm install -g npm@8.1.4 Pack project into tarball (run at package.json level) npm pack Install project from tarball globally npm install -g projectName-1.0.0.tgz Uninstall project globally npm uninstall -g projectName Set proxy configuration npm config set proxy http://username:password@

Kali Cheat-sheet

Kali Cheat-sheet

NMAP: Scan IP address for open ports # Basic scan: nmap -sT 1.2.3.4 # RPC service scan: nmap -sR 1.2.3.4 NMAP: Scan network hosts up nmap -sP 192.168.0.0/24 NMAP: List network's hostnames nmap -sL 192.168.0.0/24 NMAP: Network scan

Nginx Cheat-sheet

Nginx Cheat-sheet

Management commands systemctl start nginx systemctl stop nginx systemctl restart nginx Check configuration syntax and test it nginx -t

Create a service a timer

Create a service a timer

The goal here is to run a script that will select a random image and show it in the PIMORONI Inky Impression 7 Color ePaper every determined period of time. I assume python3 is already installed in the machine. The Pimorony Inky Impression libraries and examples can be downloaded from

OpenSSL Cheat-sheet

OpenSSL Cheat-sheet

Generate random bytes openssl rand -base64 512 openssl rand -hex 512 openssl rand -base64 -out myFile.key 512 Check the format of the private key openssl rsa -check -in private_key.pem Generate RSA key pair openssl genrsa -out private_key_2048.pem 2048 openssl rsa -in private_key_2048.