Blog
Breakdowns, measurements and operational practice — useful before you hit the problem.
18 September 2026Common Linux server problems and how to fix them
One entry point instead of seven searches: a symptom-cause-command table with links to a full write-up for each problem.
18 September 2026Passwordless sudo (NOPASSWD) on Ubuntu: scoping it to one command safely
How to allow one sudo command without a password via /etc/sudoers.d without opening a security hole.
16 September 2026Ubuntu says Permission denied: fixing file permissions with chmod and chown
Permission denied on Ubuntu: how rwx permissions work, what chmod numbers mean, and why chmod -R 777 is a bad idea.
15 September 2026Logging in as root on Ubuntu: su, sudo -i, and when you actually need it
sudo, sudo -i, su - and ssh root@: four ways to get root on Ubuntu and how they differ.
14 September 2026Ubuntu says "command not found": what to do
"Command not found" usually means a missing package, not a broken system. Causes, and what to do when the binary seems to exist.
11 September 2026Changing passwords on Ubuntu: your own, another user's, and root
passwd, sudo passwd and sudo passwd root: how they differ, how to set password expiry, and what to do when you cannot log in.
10 September 2026How to restart networking on Ubuntu and Debian
Which command restarts networking depends on the renderer, not the distro. How to identify it and restart safely on a remote server.
9 September 2026KVM vs OpenVZ: how they differ and which to choose for a VPS
Own kernel vs shared, dedicated vs floating memory, WireGuard and Docker, how to detect the virtualization type on your server, and which to choose.
7 September 2026How to choose a VPS: a task-first walkthrough
Not "get some headroom": size CPU and RAM against load, pick disk and virtualization, and benchmark the server right after payment.