Introduction to ps-list

ps-list is a command-line tool that provides detailed information regarding the currently running processes on your system. It is particularly useful for system monitoring, process management, and debugging. By leveraging ps-list, developers and system administrators can efficiently gather vital information about processes and take appropriate actions.

Key APIs of ps-list

• psList(): Fetches the list of running processes.
• psList(options): Fetches the list of running processes with optional parameters.

Code Snippets

1. Basic Usage

  const psList = require('ps-list');
  
  psList().then(data => {
    console.log(data);
  });

2. Fetch Specific Process Details

  const psList = require('ps-list');
  
  // Optional parameters to fetch specific details
  const options = {
    filter: process => process.name.includes('node'),
    all: true
  };

  psList(options).then(data => {
    console.log(data);
  });

3. Get Process Details by PID

  const psList = require('ps-list');

  psList().then(processes => {
    const processByPID = processes.find(p => p.pid === 12345);
    console.log(processByPID);
  });

App Example

Let’s create a Node.js application utilizing ps-list to monitor and log the CPU usage of Node.js processes:

  const psList = require('ps-list');
  const fs = require('fs');

  const monitorProcesses = async () => {
    const processes = await psList();

    const nodeProcesses = processes.filter(p => p.name.includes('node'));

    const logStream = fs.createWriteStream('process_log.txt', { flags: 'a' });
    logStream.write(`Timestamp: ${new Date().toISOString()}\n`);

    nodeProcesses.forEach(p => {
      logStream.write(`PID: ${p.pid}, CPU: ${p.cpu}, Memory: ${p.memory}\n`);
    });

    logStream.end();
  };

  setInterval(monitorProcesses, 60000); // Run every 60 seconds

This script will log the details of Node.js processes into a text file every minute, making it a simple yet effective monitoring tool.

Hash: 0c6e3c854100cfde4b4f186b2120c4bbe5ab61fdab6f312443daa50efe3155c2