TOOL TUTORIAL · OSINT & Information Gathering

How to install and use theharvester

theHarvester is an open-source intelligence (OSINT) gathering tool designed to help penetration testers and security researchers collect publicly available information about a specific domain or organization. It is especially effective for the reconnaissance phase of a security …

Quick install: sudo apt install theharvester

Installation steps

  1. Open a terminal on Kali Linux or another Debian-based system
  2. Run sudo apt update to refresh the package list
  3. Run sudo apt install theharvester to install it
  4. Confirm it works by running theHarvester -h
  5. Try a first scan against a domain you own

See the full theharvester reference →