Tag: guide

Somewhere in this project sits the line that sets that value, and we have no idea which file. grep 'pattern' file searches one file, and grep -r 'pattern' . walks ...

Some CDN link just handed you a 200-byte HTML file instead of the zip. We've been there, and the fix is one letter: curl -LO follows the redirect to the ...

Someone hands us a release.tar.gz and the clock's already ticking. Two commands cover almost everything: tar -xzf archive.tar.gz unpacks one, tar -czf archive.tar.gz folder builds one. The flags look cryptic ...

Still typing a password every time you SSH into a box? One command ends that: ssh-keygen -t ed25519, then Enter to accept the default path and a passphrase when it ...

Your server won't start and the terminal throws 'address already in use'. Something's squatting on that port, and sudo lsof -i :8080 (or ss -ltnp on a leaner box) tells ...

Your dev server won't start, and Windows greets you with 'address already in use'. Something's squatting on the port, and the fix is to kill that process, not the port ...

You fixed the DNS record, and your Linux box keeps serving the old IP anyway. On modern Ubuntu, Debian and Fedora the fix is sudo resolvectl flush-caches, because systemd-resolved is ...

A site moved servers yesterday and your PC keeps loading the old one. That's the Windows DNS cache holding a stale answer, and one command clears it: open Command Prompt ...

Someone asks for the WiFi password and you realize you typed it once, two years ago, and it's gone from your head. Your PC hasn't forgotten: one netsh command prints ...