Linux Performance Testing commands are commonly used in linux performance testing.

Linux Performance Testing commands are commonly used in linux performance testing.

Linux tcpdump command details

Linux strace command

Strace is often used to track system calls and received signals during process execution. In the Linux World, processes cannot directly access hardware devices. When a process needs to access hardware devices (such as reading disk files and receiving network data, you must switch from user mode to kernel mode to access hardware devices through system calls. Strace can trace the system calls generated by a process, including parameters, return values, and execution time .?

Linux netstat command details linux lsof command details

Lsof (list open files) is a tool used to list open files in the current system. In linux, everything exists in the form of a file. Through a file, you can not only access common data, but also access network connections and hardware. Therefore, for example, the transmission control protocol (TCP) and User Datagram Protocol (UDP) sockets, the system assigns a file descriptor to the application at the backend, regardless of the nature of the file, this file descriptor provides a common interface for the interaction between the application and the basic operating system. Because the descriptor list of an Application Opening file provides a large amount of information about the application itself, it is very helpful for system monitoring and troubleshooting to view this list using the lsof tool.

Linux vmstat commands

The vmstat command is the most common Linux/Unix monitoring tool that displays the status values of servers at a given interval, including CPU usage, memory usage, and virtual memory switching, IO read/write status. This command is my favorite Linux/Unix Command. One is supported by Linux/Unix, and the other is the top command. I can see the CPU and memory of the entire machine, i/O usage, rather than simply viewing the CPU usage and memory usage of each process (different use cases ).