# Redirection

Shell redirection is a command-language feature that redirects command input and output and manages file descriptors.

This is one page of public article previews, not the complete archive. Follow Next page to continue. Summaries are not the original full articles.

## Using Coolify for subdomain direct redirect without a app resource

DevFeed: [Using Coolify for subdomain direct redirect without a app resource](<https://devfeed.tech/articles/using-coolify-for-subdomain-direct-redirect-without-a-app-resource-38832.md>)

Original publisher: [Read original article](<https://lengrand.fr/using-coolify-for-subdomain-direct-redirect-without-a-app-resource/>)

Author: Julien

Published: 2025-09-14T19:07:33Z

Content type: tutorial

Language: en

Sources: [Thoughts, stories and ideas.](<https://devfeed.tech/sources/thoughts-stories-and-ideas.md>)

Topics: [proxy](<https://devfeed.tech/topics/proxy.md>), [Redirection](<https://devfeed.tech/topics/redirection.md>), [YAML](<https://devfeed.tech/topics/yaml.md>), [configuration](<https://devfeed.tech/topics/configuration.md>), [TLS (Transport Layer Security)](<https://devfeed.tech/topics/tls.md>), [interface](<https://devfeed.tech/topics/interface.md>)

Tags: [coolify](<https://devfeed.tech/tags/coolify.md>), [devops](<https://devfeed.tech/tags/devops.md>), [dns](<https://devfeed.tech/tags/dns.md>), [habits](<https://devfeed.tech/tags/habits.md>), [proxy](<https://devfeed.tech/tags/proxy.md>), [ssl](<https://devfeed.tech/tags/ssl.md>), [tls](<https://devfeed.tech/tags/tls.md>), [traefik](<https://devfeed.tech/tags/traefik.md>), [yaml](<https://devfeed.tech/tags/yaml.md>)

### AI overview

A tutorial showing how to use Coolify's dynamic proxy configuration to redirect a subdomain to an external URL without creating a full application resource. It uses a YAML configuration with Traefik to define the redirect, router, TLS handling, and required dummy service.

### Source excerpt

Coolify's dynamic proxy configuration lets you redirect subdomains to external URLs without creating full resources. Using a simple YAML file with Traefik configuration, you can set up SSL-enabled redirects directly through Coolify's interface.

## Redirecting Standard Output in C With the dup2() Function

DevFeed: [Redirecting Standard Output in C With the dup2() Function](<https://devfeed.tech/articles/redirecting-standard-output-in-c-with-the-dup2-function-4519.md>)

Original publisher: [Read original article](<https://feeds.feedblitz.com/~/920203664/0/baeldung/linux~Redirecting-Standard-Output-in-C-With-the-dup-Function>)

Author: Marcin Buczkowski

Published: 2025-06-14T07:02:25Z

Content type: tutorial

Language: en

Sources: [Baeldung - Linux](<https://devfeed.tech/sources/baeldung-linux.md>)

Topics: [C](<https://devfeed.tech/topics/c.md>), [Redirection](<https://devfeed.tech/topics/redirection.md>), [Linux](<https://devfeed.tech/topics/linux.md>), [Streams](<https://devfeed.tech/topics/streams.md>), [Command-line interface](<https://devfeed.tech/topics/cli.md>)

Tags: [c](<https://devfeed.tech/tags/c.md>), [code](<https://devfeed.tech/tags/code.md>), [command-line](<https://devfeed.tech/tags/command-line.md>), [gcc](<https://devfeed.tech/tags/gcc.md>), [linux](<https://devfeed.tech/tags/linux.md>), [processes](<https://devfeed.tech/tags/processes.md>), [processes-gcc-redirection-streams](<https://devfeed.tech/tags/processes-gcc-redirection-streams.md>), [redirection](<https://devfeed.tech/tags/redirection.md>), [streams](<https://devfeed.tech/tags/streams.md>), [tutorial](<https://devfeed.tech/tags/tutorial.md>)

### AI overview

This tutorial explains how standard input and output redirection works in Linux and how to implement it in C. It introduces file descriptors and standard streams, then shows how dup2() duplicates a descriptor so program output can be redirected to a file without changing the code that writes to STDOUT.

### Source excerpt

Learn how redirection works and the way the dup2() function achieves it in C. The post Redirecting Standard Output in C With the dup2() Function first appeared on Baeldung on Linux. Related Stories How to Find the SCHED_RR Scheduling Policy's Time Slice How Can I Swap Colors With GIMP? How to Identify the Package Manager of a Linux System

## Concealing payloads in URL credentials

DevFeed: [Concealing payloads in URL credentials](<https://devfeed.tech/articles/concealing-payloads-in-url-credentials-7671.md>)

Original publisher: [Read original article](<https://portswigger.net/research/concealing-payloads-in-url-credentials>)

Author: Gareth Heyes

Published: 2024-10-23T12:59:05Z

Content type: article

Language: en

Sources: [PortSwigger Research](<https://devfeed.tech/sources/portswigger-research.md>)

Topics: [payload](<https://devfeed.tech/topics/payload.md>), [browsers](<https://devfeed.tech/topics/browsers.md>), [Chrome](<https://devfeed.tech/topics/chrome.md>), [Firefox](<https://devfeed.tech/topics/firefox.md>), [Document Object Model (DOM)](<https://devfeed.tech/topics/dom.md>), [Vulnerabilities](<https://devfeed.tech/topics/vulnerabilities.md>), [Fuzzing/Fuzz testing](<https://devfeed.tech/topics/fuzzing.md>), [Redirection](<https://devfeed.tech/topics/redirection.md>)

Tags: [browsers](<https://devfeed.tech/tags/browsers.md>), [chrome](<https://devfeed.tech/tags/chrome.md>), [firefox](<https://devfeed.tech/tags/firefox.md>), [fuzzing](<https://devfeed.tech/tags/fuzzing.md>), [payload](<https://devfeed.tech/tags/payload.md>), [redirection](<https://devfeed.tech/tags/redirection.md>), [vulnerabilities](<https://devfeed.tech/tags/vulnerabilities.md>)

### AI overview

This article explains how payloads can be concealed in the credentials portion of URLs while remaining hidden from the address bars of Chrome and Firefox. It examines differences between document.URL and location, Firefox's handling of single quotes, and applications to DOM XSS, anchor credentials, redirection, and DOM clobbering. Safari discards URL credentials, so the described examples work only in Chrome and Firefox.

### Source excerpt

Last year Johan Carlsson discovered you could conceal payloads inside the credentials part of the URL . This was fascinating to me especially because the payload is not actually visible in the URL in