Sysadmin

Sysadmin

General

• How to Connect to a Serial Console
• How to Write Command Line Tools
• How to format an SD card or USB flash drive
• Cron Job Examples and Tip
• curl Tutorial
• SQLite3 Tutorial
• Docker Basics
• Python FTP Client Tutorial
• Read and Send Email with Python
• Rebind Caps Lock key to Escape/Control
• Working with Git Repositories in Python
• Installing and Configuring FreeNAS 8.3.1

Shell

• STDIN, STDOUT, STDERR, Piping, and Redirecting
• Useful Linux Bash Shell Aliases
• Tmux Basics
• Enhanced Shell Scripting with Ruby
• Bash Brace Expansion Tutorial
• Bash Shortcut Keys
• Replacing a String in a File with sed
• Removing all .svn Folders Recursively with find
• Python Environment Variables Tutorial

vim

• Vim Cheatsheet
• Live Coding: Getting Better w/ Vim

Security & cryptography

• GPG Tutorial
• How to Verify a GPG Signature
• How to Verify a Checksum
• Using libpcap in C
• Packet capturing in Go

SSH

• SSH Tips
• ISSH
• Expose a Local Port over a Remote VPS with SSH Remote Port Forwarding
• Fix "Broken Pipe" error on SSH connection in Fedora/VMWare
• Python SSH Tutorial
• How to Specify SSH key for Git repository

Web servers

• One-line HTTP servers
• TomCat Tutorial

Nginx

• Nginx Tutorial
• Deploy Angular Apps with Nginx
• How to Deploy Django with Nginx and uWSGI
• Deploy Ruby Rack Web Apps with uWSGI and Nginx

SSL/TLS

• Creating self-signed SSL certificates with OpenSSL
• LetsEncrypt Free SSL Certificate Tutorial
• How to add trusted CA certificate on CentOS/Fedora

Linux

• How to Create a Secure Linux System User
• Ubuntu vs Debian vs Fedora vs Arch vs Linux Mint
• Change GRUB Bootloader Timeout, Colors, Image
• Change Console Font Size in Debian
• Installing Lutris Gaming on Debian
• Installing, Configuring and Customizing Arch Linux
• Customizing Gnome 3 Desktop Environment in Arch Linux
• Customizing Openbox Window Manager in Arch Linux
• Creating Systemd Service Files
• Open a Linux Firewall port with firewall-cmd
• Debian Package Tutorial (dpkg/.deb)
• Create a Linux Desktop Launch Icon
• Setting up Tor Proxy and Hidden Services in Linux
• SVN with Cyrus sasl2db on CentOS
• AT&T Archives: The Unix Operating System

Windows

• Schedule a shutdown in Windows (sleep timer)
• Windows Run a Script on Startup
• Run Script as Windows Service
• Set Environment Variables in Windows
• Recursively Copy, Delete, and Move Directories in Windows
• Windows EOF CTRL-D equivalent
• Create custom launcher in Windows for custom file extensions

Virtual machines

• Install Linux in VirtualBox

• Install VirtualBox Guest Additions in Debian

• Disable Shared Clipboard in VMware Player

• VirtualBox Disk Encryption Tutorial

Projects

• DevNix
• issh
• mysql2excel