This happens if GitHub updates its repository signing key and your local system is holding onto an expired certificate.

Run the standard system updates to sync your local package cache with Ubuntu’s main servers: sudo apt update && sudo apt upgrade -y Use code with caution. Install or Upgrade Git

An (Ubuntu Update Deployer) is typically a bash or Python script that executes a series of update commands. A basic example looks like this:

Keeping your development tools updated ensures you have the latest security patches, performance improvements, and new features. For developers using Ubuntu, updating Git and the GitHub CLI (gh) requires slightly different steps than standard system software.

If you find GitHub Desktop clunky, the official GitHub CLI is a powerful alternative for Ubuntu users. To update it: sudo apt updatesudo apt install gh Once updated, run gh auth login to refresh your connection. Troubleshooting Update Errors

Flatpak makes it incredibly easy to keep third-party applications isolated and updated. flatpak update io.github.shiftey.Desktop Use code with caution. If Installed via Snap

: A dedicated command-line tool that brings GitHub-specific features (like Pull Requests, Issues, and Releases) directly to your terminal.

git tag -a v1.0.0 -m "Release 1.0.0" git push origin v1.0.0 gh release create v1.0.0 --title "v1.0.0" --notes "Release notes"

This guide provides a detailed walkthrough for setting up, updating, and managing your GitHub repositories using the Ubuntu terminal. 1. Prerequisites: Preparing Ubuntu for GitHub

gh --version

Run the version check again to confirm the update succeeded: git --version Use code with caution. 3. Installing and Updating the GitHub CLI ( gh ) on Ubuntu

sudo apt update sudo apt install gh

: Much faster for managing GitHub-specific tasks than visiting the website.

The GitHub CLI ( gh ) brings pull requests, issues, and other GitHub concepts directly to your terminal. If you installed it via the default Ubuntu repositories, you might have an outdated version. To get the latest features, you need to use GitHub's official package repository. Step 1: Verify Your Current Version Check which version you currently have installed: gh --version Use code with caution. Step 2: Authenticate the Official GitHub Repository

If you use GitHub Actions for automation, ensuring your workflow uses the latest is critical for performance and security.

sudo snap refresh