centos cmatrix資源監控技巧

Note: cmatrix is primarily a terminal-based visual effect tool (simulating the “Matrix” digital rain), and its built-in system monitoring capabilities are limited. For professional resource monitoring, tools like top, htop, or glances are more suitable. However, you can use cmatrix to view basic real-time metrics with the following steps:

1. Install cmatrix on CentOS

First, ensure your system is updated, then install cmatrix via the default repository or EPEL (if needed):

# Update system and install EPEL (if not already installed)
sudo yum update -y
sudo yum install epel-release -y

# Install cmatrix
sudo yum install cmatrix -y

2. Run cmatrix with Default Monitoring

Execute cmatrix in the terminal to start the animation. By default, it shows:

• CPU usage (as a percentage)
• Memory usage (total/used)
• Process count (total/running/sleeping)

Press q to exit.

3. Customize Display with Keyboard Shortcuts

While cmatrix is running, use these keys to toggle additional metrics:

• c: Toggle CPU usage chart (shows user/system/idle percentages).
• m: Toggle memory usage chart (shows RAM allocation).
• ?: View all available keyboard commands (e.g., p for process list, s for system info).

4. Modify Configuration File for Persistent Settings

To make changes permanent (e.g., enable specific metrics on startup), edit the config file ~/.cmatrixrc (create it if it doesn’t exist):

nano ~/.cmatrixrc

Add/modify these lines to customize:

# Enable CPU, memory, and process monitoring (1=enabled, 0=disabled)
cpu=1
mem=1
procs=1

# Set colors (e.g., red for CPU, cyan for memory)
cpu_color=red
memory_color=cyan

# Adjust update interval (seconds)
delay=1

Save the file and restart cmatrix for changes to take effect.

5. Advanced: Use Command-Line Parameters

For one-time customizations, use command-line arguments when starting cmatrix:

# Run in full-screen mode with memory monitoring enabled
cmatrix -f -m

# Disable colors and show raw data
cmatrix -C -r

View all options with cmatrix --help.

6. Limitations to Note

• cmatrix is not a substitute for professional monitoring tools (e.g., htop for detailed process stats, glances for network/disk usage).
• Advanced metrics (e.g., disk I/O, network traffic) require modifying the source code or using plugins (if available for your distribution).
• Performance may degrade if too many metrics are enabled simultaneously.

By following these steps, you can use cmatrix to add a visual twist to basic system monitoring on CentOS. For comprehensive insights, pair it with dedicated monitoring tools.