Questions
Find answers to frequently asked development questions. For information about Better Stack products, explore our docs.
How to Add the File Name as a Field in Logstash?
If you're dealing with log entries from multiple files and want to dynamically add the file path to each log event to identify its source, you can achieve this using Logstash. Here's how: You can u...
How to Escape Tab Separators in Logstash?
To correctly process CSV data that uses tab characters as separators in Logstash, it's necessary to configure the Logstash CSV filter to recognize the tab separators. Suppose you're reading CSV da...
How to Debug the Logstash File Plugin
To debug the Logstash file plugin or Logstash configuration, follow these steps. First, ensure your configuration file has no errors using the following command: bin/logstash --config.testandexit -...
Can You Delete the Message Field From Logstash?
Yes, you can remove the message field and other fields if you find them redundant or unnecessary. This will not cause any issues. To delete the message field, you can use the following configuratio...
How to Handle Multiple Heterogeneous Inputs With Logstash?
Here's how you can manage multiple heterogeneous inputs with Logstash, enabling the Logstash pipeline to process and route logs from various sources to different destinations. Logstash's configurat...
How to Safely Stop Logstash?
To stop a Logstash instance safely without causing issues, follow these instructions. If you're on a systemd-based system, you can stop Logstash using the following command: systemctl stop logstash...
How to Auto-Reload Logstash Configuration
To enable Logstash to detect and reload the configuration file automatically, you can use the --config.reload.automatic option when starting Logstash. Here's how to activate it. When launching Log...
How to Use All the Cores on Multi-Core Machines in node.js
Node.js is designed to be single-threaded, but you can take advantage of multi-core machines by utilizing the cluster module or by creating separate Node.js processes manually. Using the cluster Mo...
How to Run Typescript Files from Command Line in node.js?
To run TypeScript files from the command line in Node.js, you need to transpile the TypeScript code to JavaScript first, and then execute the generated JavaScript file using Node.js. Here are the s...
Node Version Manager Install - Nvm Command Not Found
If you have installed Node Version Manager (NVM) but are encountering the issue where the nvm command is not found, it could be due to a few reasons. Here are some steps to troubleshoot and resolve...
How to Store node.js Deployment Settings/Configuration Files?
Storing deployment settings or configuration files for a Node.js application can be approached in several ways. The choice depends on your specific needs, the environment, and the level of security...
Error: EACCES: permission denied, access '/usr/local/lib/node_modules'
The error Error: EACCES: permission denied, access '/usr/local/lib/node_modules' typically occurs when you try to install global npm packages without the necessary permissions. This can happen if y...
How to Use Executables from a Package Installed Locally in node_modules?
When you install a package locally using npm or yarn, the package's executables (if any) are typically added to the node_modules/.bin directory. You can use these executables directly from the comm...
How Can I Specify the Required node.js Version in package.json?
You can specify the required Node.js version in the engines field of your package.json file. This field is used to specify the runtime that your project requires. Here's an example: { "name": "yo...
How to Update node.js?
To update Node.js to the latest version, you can use a version manager like NVM (Node Version Manager) or download and install the latest version directly from the official Node.js website. Using N...
How to Sleep in node.js?
In Node.js, there is no built-in sleep function like in some other programming languages. However, you can use the setTimeout function to simulate a sleep-like behavior. Here's a simple example: fu...
How to Process POST Data in node.js?
In Node.js, you can process POST data in different ways depending on the framework or library you are using. I'll provide examples for both native HTTP and using the popular Express.js framework. N...
How to Append to a File in Node?
In Node.js, you can append data to a file using the fs (File System) module. The fs.appendFile function is specifically designed for this purpose. Here's an example: const fs = require('fs'); const...
How to Fix Error: Request Entity Too Large
The "Error: request entity too large" typically occurs when the payload of a HTTP request exceeds the size limit set by the server. This can happen in various contexts, such as when handling file u...
How to Remove File in node.js
In Node.js, you can remove (delete) a file using the built-in fs (File System) module. The fs module provides the unlink function for this purpose. Here's an example: const fs = require('fs'); cons...
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