Shell & Coin Blog
Every Linux guide, crypto explainer and review we have published, newest first.
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Dollar Cost Averaging Crypto: The DCA Strategy Explained
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.
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Ethereum Staking Explained: How to Earn ETH Rewards Without 32 ETH
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.
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How to Use Btrfs on Linux: Subvolumes, Snapshots, and Compression
Learn to use Btrfs on Linux — create subvolumes, take snapshots, enable zstd compression, and run scrubs. Practical commands for every Linux admin.
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What Is Worldcoin (WLD): Sam Altman’s Biometric Crypto Project Explained
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.
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Best Linux Email Client in 2026: 6 I Tested on My Homelab
Looking for the best Linux email client in 2026? I tested 6 options on my homelab — from Thunderbird to NeoMutt. Here's which one fits your workflow.
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Jupiter (JUP) Crypto Explained: Inside Solana’s Largest DEX Aggregator
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.
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How to Configure AppArmor on Linux: Profiles, Modes, and Real Fixes
Learn how to configure AppArmor on Linux—check status, create custom profiles, switch between modes, and harden your system with real command examples.
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What Is an Inverted Yield Curve (And What It Means for Crypto)
The inverted yield curve has preceded every U.S. recession since 1955. Here's what it is, how it works, and what it means for your crypto portfolio.
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How to Configure SELinux on Linux: Modes, Contexts, and Real-World Fixes
Learn how to configure SELinux on Linux: check and switch modes, manage file contexts, troubleshoot denials, and use booleans to harden your servers.
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What Is Injective (INJ) Crypto: The Layer 1 That Puts Finance First
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.
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Best Browser for Linux in 2026: 6 I Tested on My Daily Driver
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.
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What Is Berachain (BERA) Crypto: The DeFi-Native L1 Rewiring Blockchain Incentives
Berachain (BERA) is the DeFi-native L1 using Proof of Liquidity to align incentives. Here's how the three-token system actually works—and whether it lasts.
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Best Linux NAS Software in 2026: 5 I Tested on My Homelab
Running a homelab NAS in 2026? I tested TrueNAS SCALE, OMV, Unraid, and more. Here's which Linux NAS software is actually worth your time.
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What Is a Backdoor Roth IRA: The High-Earner Tax Strategy Explained
Learn how a backdoor Roth IRA works, the pro-rata rule trap, and step-by-step instructions for high earners to get tax-free retirement money in 2026.
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How to Set a Static IP in Linux: Ubuntu, RHEL, and Debian Covered
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.
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Crypto Sector Rotation: Follow the Money From Bitcoin to Altcoins
Crypto sector rotation explained — how capital flows from Bitcoin to altcoins, which sectors move first, and the key signals to watch before the next altseason.
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Crypto IRA Explained: How to Invest in Bitcoin Tax-Free (And Whether You Should)
A crypto IRA lets you invest in Bitcoin inside a tax-advantaged retirement account. Here's how it works, what it costs, and if it's worth it.
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How to Use iotop in Linux: Monitor Disk I/O Per Process Like a Pro
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.
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What Is Curve Finance (CRV): The DEX Powering DeFi’s Stablecoin Economy
Learn what Curve Finance (CRV) is, how the StableSwap AMM works, what veCRV means, and why Curve became DeFi's deepest stablecoin liquidity layer.
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How to Use nftables in Linux: The Modern Firewall Every Admin Needs
Learn how to use nftables in Linux with real examples. Covers tables, chains, rules, and building a persistent server firewall from scratch.
