![]() ![]() Sar is a command-line utility that is part of the Sysstat package. To List all Processes of Specific User ps -u user_name ps is a useful tool for troubleshooting and managing system resources, and it can be customized to display only the information needed for a specific task. It provides a snapshot of the system’s current state, including the process ID (PID), the user running the process, the amount of CPU and memory used, and more. Ps is a command-line utility that displays information about running processes on a Linux system. It allows users to navigate through the list of running processes using arrow keys, sort processes by different criteria, and filter the list by process name or user. Htop is an interactive process viewer and system monitor that is similar to Top but offers a more user-friendly interface. Top is an excellent tool for troubleshooting system performance issues and identifying resource-intensive processes. It displays a list of running processes, sorted by their resource usage, and updates the list periodically. Top is a command-line utility that provides real-time information about system processes, CPU usage, memory usage, and other system statistics. If you only use 3GB today, you just wasted 1GB.In this article, we will explore 15 essential system and performance monitoring tools for Linux administrators. It's not like if you use only 3GB today you can use 5GB tomorrow. The OS tries to keep as little memory free as possible, only enough to handle special situations such as bursts of data received from the network. Only memory that is being used can improve performance. ![]() The reason so much memory is used is because free memory is wasted memory. Should this be considered free memory or not? But if that memory is needed for some other purpose, the file data can be thrown away since it's on the disk. If the program runs again, however, the information can be used from memory so it doesn't have to be loaded from disk again. ![]() The executable file that holds the program itself is still in memory. But it's free in the sense that the information can simply be discarded if the memory is needed.įor example, say you run a program. The memory is used in the sense that it contains information that may be useful. ![]() It's just the difference of whether you consider memory that contains discardable data as used or not. ![]()
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