Linux
94 guides
Linux Guides
Linux guides that respect your data — partitioning warnings, copy-paste commands you can audit, and verification steps that prove the fix worked.
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Search and filter 94 published Linux guides.
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Install & setup
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Networking
Security
Performance
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Storage
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Troubleshooting
Admin
Find disk usage with du and ncdu
Practical Linux guide: find disk usage with du and ncdu without the usual guesswork.
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Fix high load average on Linux
Practical Linux guide: fix high load average on Linux without the usual guesswork.
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Fix NetworkManager not connecting
Practical Linux guide: fix NetworkManager not connecting without the usual guesswork.
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Rollback a package version (APT)
Practical Linux guide: rollback a package version (APT) without the usual guesswork.
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Set up OpenVPN client on Linux
Practical Linux guide: set up OpenVPN client on Linux without the usual guesswork.
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Set up Wi‑Fi from the command line
Practical Linux guide: set up Wi‑Fi from the command line without the usual guesswork.
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Set up WireGuard on Linux
Practical Linux guide: set up WireGuard on Linux without the usual guesswork.
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sudo vs root: best practice
Practical Linux guide: sudo vs root: best practice without the usual guesswork.
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Unattended security upgrades on Ubuntu
Practical Linux guide: unattended security upgrades on Ubuntu without the usual guesswork.
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Dual-boot Linux and Windows
Practical Linux guide: dual-boot Linux and Windows without the usual guesswork.
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Install Debian minimal server
Practical Linux guide: install Debian minimal server without the usual guesswork.
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Install Fedora Workstation
Practical Linux guide: install Fedora Workstation without the usual guesswork.
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Install Linux in a VM (VirtualBox)
Practical Linux guide: install Linux in a VM (VirtualBox) without the usual guesswork.
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Partitioning during Linux install
Practical Linux guide: partitioning during Linux install without the usual guesswork.
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Change DNS servers on Linux
Point Linux at reliable resolvers and confirm systemd-resolved is not fighting you.
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Configure static IP on Linux
Give servers and appliances stable IPs — netplan examples you can adapt.
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Create a sudo user on Linux (not root login)
Daily admin work as a named sudo user — leave root SSH login disabled.
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Diagnose a failed systemd service
Why did the service die? Read the unit log and fix the actual error.
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Fix “No space left on device” on Linux
Find what ate your disk — and free space without deleting the wrong database.
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Harden SSH server on Linux
Lock down SSH without locking yourself out — test every change in a second session.
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Install Docker on Linux
Container runtime installed the supported way — with basic security awareness.
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Linux file permissions: chmod and chown
Read and fix permission denied errors without chmod 777 everything like a maniac.
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Linux won’t boot: recovery flow
Work through boot failures methodically — from kernel panic to fstab typos.
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rsync backup basics on Linux
Simple, scriptable backups with rsync — the workhorse every Linux admin should know.
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Topics we cover
Install & setup
Distro installs, dual-boot, LUKS (12)
Updates
APT, upgrades, package holds (8)
Networking
Static IP, firewall, VPN (14)
Security
SSH, permissions, hardening (10)
Performance
systemd, logs, load, swap (11)
Backups
rsync, restic, snapshots (7)
Storage
mounts, fstab, LVM (7)
Apps & tools
Docker, LAMP, scripting (10)
Troubleshooting
GRUB, boot recovery, services (8)
Admin
Users, certs, mail relay (7)