How to find files with find on Linux
A disk fills up, or a config file vanishes, and suddenly we need one file out of fifty thousand. find...
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How to search text in files with grep
Somewhere in this project sits the line that sets that value, and we have no idea which file. grep 'pattern'...
Read moreDetailsHow to download a file and test an API with curl
Some CDN link just handed you a 200-byte HTML file instead of the zip. We've been there, and the fix...
Read moreDetailsHow to extract and create tar.gz archives (tar)
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,...
Read moreDetailsHow to generate an SSH key (ssh-keygen)
Still typing a password every time you SSH into a box? One command ends that: ssh-keygen -t ed25519, then Enter...
Read moreDetailsHow to kill the process using a port on Linux
Your server won't start and the terminal throws 'address already in use'. Something's squatting on that port, and sudo lsof...
Read moreDetailsHow to kill the process using a port on Windows
Your dev server won't start, and Windows greets you with 'address already in use'. Something's squatting on the port, and...
Read moreDetailsHow to flush the DNS cache on Linux
You fixed the DNS record, and your Linux box keeps serving the old IP anyway. On modern Ubuntu, Debian and...
Read moreDetailsHow to flush the DNS cache on Windows
A site moved servers yesterday and your PC keeps loading the old one. That's the Windows DNS cache holding a...
Read moreDetailsHow to see a saved WiFi password on Windows
Someone asks for the WiFi password and you realize you typed it once, two years ago, and it's gone from...
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