Top
Top is a command-line utility in Unix-like operating systems that provides a dynamic, real-time view of running processes and system resource usage, such as CPU and memory consumption. It displays a continuously updated list of processes sorted by resource usage, allowing users to monitor system performance and identify resource-intensive tasks. Top is commonly used for system administration, debugging, and performance analysis.
Developers should learn Top for real-time system monitoring and troubleshooting, especially when diagnosing performance issues, memory leaks, or high CPU usage in applications. It is essential for DevOps, sysadmins, and backend developers working on servers or production environments to ensure optimal resource allocation and stability. Use cases include identifying runaway processes, monitoring server health, and optimizing application performance in Linux-based systems.