Category: Linux

SSH dropping with client_loop: send disconnect: Broken pipe? It’s usually an idle timeout or flaky network. This guide shows quick client fixes (ServerAliveInterval, TCPKeepAlive, IPQoS), sensible server defaults (ClientAliveInterval), and a fast diagnosis playbook using ssh -vvv and server logs. We also cover resilient workflows—tmux, rsync, and mosh—so brief outages don’t kill your work.

When you need to test a load balancer, CDN, or name-based virtual host, you often have to hit a specific IP while sending the real Host header. This guide shows the right way to do it with curl—for both HTTP and HTTPS—so SNI and certificate validation stay intact. You’ll learn when to use –resolve vs –connect-to, how to handle IPv6 and nonstandard ports, and get copy-paste examples plus a quick troubleshooting checklist.

Keep Linux clocks correct in seconds. This quick guide gives copy‑paste one‑liners for chrony, systemd‑timesyncd, and legacy ntpd across RHEL/Alma/Rocky, Amazon Linux, Ubuntu/Debian, and SUSE. Includes verification commands, common gotchas, and how to point at your own NTP servers.