In the Linux operating system, understanding the performance of the system is one of the most important tasks. Whether you are a novice or an experienced veteran, you can get a lot of useful information by monitoring system performance. So how to monitor system performance in Linux? The following is a detailed introduction.
1. top command
The top command is one of the most common and basic Linux system monitoring tools. It can display running processes and system resource usage in real time. The following is the basic usage of the top command:
top
In the output of the top command, you can see information such as CPU usage, memory usage, number of processes, process ID, etc. Press the q key on the keyboard to exit the top command.
2. htop command
The htop command is an improved version of the top command, providing a more beautiful and interactive interface. It supports a variety of operations, such as pressing the F key on the keyboard to sort processes, pressing the H key on the keyboard to display the process tree, etc. The following is the usage of htop command:
htop
The interface of htop is more friendly. You can move up and down through the arrow keys, and you can use the F1-F10 keys to perform different operations.
3. vmstat command
The vmstat command is used to report virtual memory statistics and system performance. It can display various statistics about processes, memory, swap and CPU. The following is the usage of vmstat command:
vmstat 1
The above command will display system performance information every 1 second.
4. iostat command
The iostat command is used to report CPU usage and device utilization. It provides information about the device's read and write data, average wait time, and number of I/O requests per second. The following is the usage of iostat command:
iostat -d -x
The above command will display detailed information about disk usage, including read and write rates, bandwidth, and average response time for each device.
5. sar command
The sar command is used to collect and report information on system activities. It provides detailed statistics related to CPU, memory, I/O and network. The following is the usage of sar command:
became -u 1 10
The above command will display 10 samples of CPU usage every 1 second.