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All articles tagged #linux — practical guides from production experience.
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66 posts tagged #linux · page 8 of 8
December 5, 2024·12 min read
Linux TIME_WAIT Explained: Why It Causes Connection Failures and How to Fix It
Linux TIME_WAIT exhausts ephemeral ports and causes ECONNREFUSED under load — even when your app is healthy. Learn what TIME_WAIT is, how to detect port exhaustion with ss and netstat, and the exact sysctl fixes that resolve it.
#linux#networking#troubleshooting#infrastructure#debugging
June 18, 2024·4 min read
Replacing iptables with nftables: A Practical Migration Guide
iptables is showing its age. nftables is the modern replacement — cleaner syntax, better performance, and already the default on most distros. Here's how to migrate.
#firewall#linux#security#networking
May 2, 2024·9 min read
strace, lsof, and ss: The Trio That Solves Every Mystery
When logs give you nothing and the debugger isn't an option, these three tools let you see exactly what a running process is doing at the system call level.
#debugging#linux#troubleshooting#production