Updated linux script install to use pip

[mikefrobbins]

PR Summary

Fixes AB#509594, Fixes #5533 - Updated linux script install article to use pip.

PR Checklist

• Descriptive Title: This PR's title is a synopsis of the changes it proposes.
• Summary: This PR's summary describes the scope and intent of the change.

[Copilot]

Pull Request Overview

This PR modernizes the Linux installation documentation for Azure CLI by replacing the legacy script-based installation method with a pip-based approach using Python virtual environments. The update improves installation reliability, adds security warnings about hash-based integrity checks, and simplifies the update and uninstall processes.

Key Changes

• Replaced curl-based install script with pip installation in a virtual environment
• Updated Python requirements from 3.8-3.10 to 3.10+ and removed libffi/OpenSSL dependencies
• Simplified troubleshooting section by removing script-specific issues and focusing on common PATH/proxy problems

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[Copilot]

In bash, the grep -q command with the || operator may not behave as expected if .bashrc doesn't exist. While echo will create the file, a safer approach would be to ensure the file exists first, or use:

grep -qxF 'export PATH="$HOME/bin:$PATH"' ~/.bashrc 2>/dev/null || echo 'export PATH="$HOME/bin:$PATH"' >> ~/.bashrc

The -x flag ensures an exact line match, -F treats the pattern as a fixed string (not regex), and 2>/dev/null suppresses error output if the file doesn't exist.

Suggested change

	grep -q 'export PATH="$HOME/bin:$PATH"' ~/.bashrc || echo 'export PATH="$HOME/bin:$PATH"' >> ~/.bashrc
	grep -qxF 'export PATH="$HOME/bin:$PATH"' ~/.bashrc 2>/dev/null || echo 'export PATH="$HOME/bin:$PATH"' >> ~/.bashrc

[learn-build-service-prod]

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[learn-build-service-prod]

Learn Build status updates of commit 771d2e0:

✅ Validation status: passed

File	Status	Preview URL	Details
docs-ref-conceptual/Latest-version/includes/cli-install-linux-script.md	✅Succeeded	View (azure-cli-latest)

For more details, please refer to the build report.