How to do a DNS lookup from the command line
You push a DNS change, then sit there wondering if it actually took. Don't wonder, ask: nslookup example.com works on any OS, Windows included, and confirms a name resolves or ...
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You push a DNS change, then sit there wondering if it actually took. Don't wonder, ask: nslookup example.com works on any OS, Windows included, and confirms a name resolves or ...
Someone on the phone asks for your IP, and you blank on which command your OS wants. Windows takes ipconfig; Linux wants ip addr, or just ip a if you're ...
So the script won't run, or a web folder throws a 403 you can't explain. That's permissions, and the fix is usually chmod 644 for a plain file or chmod ...
A disk fills up, or a config file vanishes, and suddenly we need one file out of fifty thousand. find is the tool for that, and its shape never changes: ...
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 ...
