An amusing tale of two engineers moving a mail server with a UPS illustrates the obsession with uptime, followed by a practical guide to the Linux uptime command, its options, output interpretation, and how load average reflects system performance.
This article explains how to use essential Linux commands such as uptime, dmesg, vmstat, mpstat, pidstat, iostat, free, sar, and top to monitor system load, CPU usage, memory, I/O, and network activity, interpreting their outputs for effective troubleshooting.
This article compiles various real-world anecdotes from Zhihu users describing computers and servers that have remained continuously operational for periods ranging from over six years to more than four decades, highlighting examples from data centers, legacy hardware, and even space probes.
The 2021 Uptime Institute Global Data Center Survey, based on responses from over 800 operators and owners worldwide, highlights growing sustainability concerns, decreasing outage frequency, persistent challenges in water usage and emissions tracking, the impact of AI, supply‑chain disruptions, and rising rack density trends.
This guide explains how to install the uptimed daemon on various Linux distributions, enable and start its service, and use the uprecords command with its many options to view detailed system uptime, boot, and downtime histories.
This article explains the Linux uptime command, describing its purpose, basic syntax, available options, common usage examples, and deeper concepts such as system load average, CPU core considerations, and how to retrieve related information from /proc files.
This article explains four methods to determine MySQL server startup time, such as checking service status, querying uptime, using ps, and inspecting logs, and also outlines common crash causes like bugs and resource allocation failures, providing troubleshooting steps and diagnostic commands.
The article outlines seven essential performance metrics—response time and throughput, average load, error rate, GC pause time, business indicators, uptime, and log size—explaining their significance for application health and recommending popular monitoring tools for each metric.
This guide introduces key Linux commands—such as uptime, who, uname, du, df, free, pmap, vmstat, ifconfig, ip, netstat, top, and pstree—to help you quickly assess system status, resource usage, and process relationships, enabling effective troubleshooting and maintenance.
This guide explains how to use essential Linux monitoring commands—including date, uptime, w, top, who, and last—detailing their output formats, key fields, and practical examples for tracking system time, load, user activity, and recent logins.
This guide walks through key Linux commands—uptime, dmesg, vmstat, mpstat, pidstat, iostat, free, sar, and top—explaining their outputs and how to interpret them for effective system performance analysis and troubleshooting.
Learn how to use the Linux ps command with the etime and etimes options to display the elapsed runtime of a specific process on an Ubuntu server, including finding the PID, formatting the output, and hiding headers for clean results.
This guide explains both static and dynamic CPU performance indicators, shows how to retrieve static details via /proc/cpuinfo, and demonstrates using Linux commands like top, uptime, and ps to assess load, identify heavy processes, and interpret per‑core usage statistics.
Understanding Linux system load involves checking the average number of processes waiting for CPU time, and the ‘uptime’ command provides the current time, uptime duration, active users, and three load average values for the past 1, 5, and 15 minutes, helping you gauge performance.
