Skip to content

Patching

Sytem Updates

What are System Updates?

  • Updates make sure your Linux system has the latest features and security fixes. It's like updating your phone's operating system to get new features and stay safe.

Why Update?

  • To protect your system from hackers.
  • To fix bugs that might cause problems.
  • To get the latest features and improvements.

How to Update Your System:

  1. For Ubuntu/Debian systems:

    • Check for updates: sudo apt update
    • Install updates: sudo apt upgrade

    • For Fedora/Red Hat systems:

    • Check and install updates: sudo dnf upgrade

Package Management

What is Package Management?

  • Package management involves installing, updating, and removing software packages. Think of it as managing apps on your phone.

Why Manage Packages?

  • To install new software or apps you need.
  • To remove software you don't use anymore.
  • To keep your software up to date with the latest versions.

How to Manage Packages:

  1. Installing a new package:

    • Ubuntu/Debian: sudo apt install packageName
    • Fedora/Red Hat: sudo dnf install packageName

    • Removing a package:

    • Ubuntu/Debian: sudo apt remove packageName

    • Fedora/Red Hat: sudo dnf remove packageName

    • Searching for a package:

    • Ubuntu/Debian: apt search packageName

    • Fedora/Red Hat: dnf search packageName

Example: Setting Up a Web Server

  • Objective: Install Apache web server on your Linux system.
  • Steps:
    1. Update your system using the update commands mentioned above.
    2. Install Apache:
      • Ubuntu/Debian: sudo apt install apache2
      • Fedora/Red Hat: sudo dnf install httpd
    3. Check if Apache is running: sudo systemctl status apache2 or httpd depending on your system.

Assignments

  1. Install a Software: Choose any software, install it using your system's package manager, and then use it.
  2. Remove the Software: After trying the software, remove it from your system using the package manager.

Interview Questions

  1. What command would you use to update all packages on a Ubuntu system?
  2. How do you install a package using DNF?
  3. What's the difference between apt and apt-get?
  4. How can you list all installed packages on your Linux system?