What Are Crypto Perpetual Futures (And How I Made $8,400 Trading Them)
Alexa Velin
January 18, 2026
Root access to modern finance.
Root access to modern finance.
The Graph (GRT) is the indexing protocol powering most of DeFi. Learn how subgraphs, indexers, curators, and GRT tokenomics actually work.
Stellar (XLM) is the payments blockchain powering cross-border remittances, USDC, and the DTCC’s 2027 tokenized securities platform. Here’s how it works.
A spot Bitcoin ETF holds real BTC and trades on stock exchanges. Here’s how it works, what it costs, the top funds to know, and who should actually buy one.
Dollar cost averaging (DCA) in crypto means buying fixed amounts at regular intervals. Learn how it works, when it beats lump sum, and how to start today.
Learn how Ethereum staking works, the 4 methods to earn ETH rewards, current APY rates (3-5%), real risks, and IRS tax rules. No 32 ETH needed for most.
Learn how Worldcoin (WLD) uses iris scans to verify human identity, what World ID enables, how World Chain works, and the privacy risks you need to know.
Learn how to set up Samba on Linux step by step — smb.conf, user setup, firewall rules, SELinux context, and connecting Windows and Linux clients.
Learn to use Btrfs on Linux — create subvolumes, take snapshots, enable zstd compression, and run scrubs. Practical commands for every Linux admin.
Learn how to configure AppArmor on Linux—check status, create custom profiles, switch between modes, and harden your system with real command examples.
Learn how to configure SELinux on Linux: check and switch modes, manage file contexts, troubleshoot denials, and use booleans to harden your servers.
Learn how to set a static IP in Linux using Netplan, nmcli, or /etc/network/interfaces — with working examples for Ubuntu, RHEL, Rocky, and Debian.
Learn how to use iotop in Linux to monitor disk I/O per process in real time. Install, read output, use key flags, and diagnose disk bottlenecks fast.
Troubleshooting Common Linux Boot Problems: A Comprehensive Guide Advertisement: Racknerd.promo – Affordable and Reliable Servers Troubleshooting Common Linux Boot Problems: A Comprehensive Guide Booting problems can be frustrating for Linux users. This guide provides a comprehensive approach to troubleshooting common boot issues, helping you get your system back up and
Learn how to use the umask command in Linux to set secure default file permissions. Includes real-world examples, octal notation explained, and security best practices for 2025.
Learn how to use the openssl command in Linux for certificate inspection, key generation, SSL testing, and file encryption. Complete sysadmin guide with examples.
Learn how to read a balance sheet with this beginner-friendly guide. Understand assets, liabilities, equity, and key financial ratios to make smarter investment decisions.
Learn how to configure UFW firewall on Linux with this complete guide. Secure your Ubuntu or Debian server with simple commands, avoid common mistakes, and implement best practices.
Learn what a high yield savings account is and how it earns 10-15x more than traditional banks. Real examples, FDIC insurance explained, and setup guide for 2025.
Learn how to use Git on Linux from scratch. Install, configure, commit, branch, and push code. Practical sysadmin workflows with real command examples.
Learn how to schedule cron jobs in Linux with this complete guide. Includes syntax examples, common mistakes to avoid, troubleshooting tips, and real-world automation patterns.
An honest review of the Tria crypto card from a self-custody advocate. Covering the up to 6% cashback, card tiers, pros and cons, and whether this cross-chain neobank card is worth it in 2025.
Master Linux file permissions with this complete guide. Learn to read rwx notation, avoid chmod 777 mistakes, and secure your system properly.
Learn how to check Linux version and distribution using hostnamectl, /etc/os-release, and uname commands. Complete guide with practical examples for 2025.
Terminal Productivity Hacks: Essential Tools and Shortcuts for Linux Power Users (2025 Guide) Hey Linux enthusiasts! Alice here, back with another deep dive into the world of Linux. Last week, while working on a complex server migration project, I found myself spending hours in the terminal. What started as a
Learn how to use the free command in Linux to monitor memory usage, interpret available vs used memory, and avoid common mistakes. Practical examples for sysadmins.
Why 74°F in Texas is slowly destroying your health (and why “just open a window” is terrible advice) The Texas Reality Check College Station, Texas: 75% average humidity. 200+ days above 70% humidity. Dew points so high they’re classified as “oppressive.” When someone suggests opening a window on a 71°F
Learn how to check open ports in Linux with ss, netstat, lsof, and nmap. Complete guide with practical examples, troubleshooting tips, and security best practices for 2025.
Master the grep command in Linux with practical examples. Learn essential flags, regex patterns, recursive search, and real-world sysadmin use cases.
Learn how to use nmap in Linux for network scanning, security audits, and port discovery. Complete guide with examples, best practices, and legal considerations.
Discover the best Linux container management tools in 2026. I personally tested Portainer, Dockge, Lazydocker, ctop, Komodo, and Dozzle on my homelab.
I tested 6 browsers on Linux in 2026: Firefox, Brave, LibreWolf, Vivaldi, Chromium, and Ungoogled Chromium. Here’s which one wins for privacy and speed.
I spent three years with my charts looking like a Jackson Pollock painting – 15 different indicators, 8 moving averages, Fibonacci levels everywhere, trend lines crossing like spaghetti. You know what all those indicators told me? Absolutely nothing useful. They contradicted each other constantly, and I lost $30,000 paralyzed by
The best Linux virtualization software in 2026, tested: Proxmox VE, KVM/QEMU, VirtualBox, GNOME Boxes, and more — ranked for homelab and enterprise use.
Learn what a brokerage account is, how it works, and when you need one. Complete guide covering taxes, account types, and common mistakes beginners make with real examples.
Learn how to check listening ports in Linux using ss, netstat, and lsof. Master port monitoring for security and troubleshooting in 2025.
I tested the top Linux terminal emulators in 2025 — Kitty, Alacritty, WezTerm, Ghostty, and GNOME Terminal. Here is which one actually belongs in your workflow.
What is Sei Network (SEI) crypto? Learn how this L1 blockchain delivers 12,500 TPS, sub-400ms finality, and DeFi-native speed using Twin-Turbo consensus.
Jupiter (JUP) is Solana’s dominant DEX aggregator with $1T+ in volume and 95% market share. Here’s how it works, what JUP does, and if it’s worth your attention.
Injective (INJ) is a Layer 1 blockchain built from scratch for DeFi finance. Learn how its MEV-resistant order book, burn tokenomics, and RWA markets work.
What is Shiba Inu (SHIB)? Learn how this Ethereum meme coin evolved into a DeFi ecosystem with Shibarium L2, ShibaSwap DEX, and a deflationary burn model.
Zero knowledge proofs let you verify truth without revealing data. Here’s how ZK tech powers Ethereum L2 scaling, DeFi privacy, and the future of crypto in 2026.
Set up MetaMask wallet in minutes. Learn how to install it, secure your seed phrase, add custom networks, and avoid the scams that steal from 500 users daily.
What is Hedera HBAR crypto? Learn how hashgraph consensus, the Governing Council, and enterprise use cases make HBAR different from every other blockchain.
Hot wallet vs cold wallet explained: the key differences, real security risks, and which crypto storage strategy makes sense for your holdings.
Aptos is a Layer-1 blockchain built by ex-Meta engineers using the Move language. Learn how APT, Block-STM, and real-world asset adoption make it unique.
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