🔤 Variables

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🎓 Who This Is For

• Beginners learning shell scripting
• Intermediate users improving script structure
• Advanced engineers reviewing fundamentals
• DevOps and sysadmins working with POSIX systems

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🔧 Define Variable

NAME="Robert"

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🔧 Use Variable

echo "$NAME"

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🔧 Environment Variables

export PATH="/usr/local/bin:$PATH"