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How to fix ssh connection refused error on a VPS

An SSH "Connection refused" error means your client can't establish a TCP connection to the server at all — the port is closed, the service isn't running, or something is blocking the traffic. Here's how to systematically diagnose and fix it. 1. Verify

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How to check disk space usage in Linux

Running out of disk space on a Linux server can crash services, corrupt databases, and cause all kinds of hard-to-debug problems — catching it early starts with knowing which commands to run and what the output actually means. Check Overall Disk Space with df The df command (disk free)