📖 Table of Contents

Shell Expansion

There are 7 types of shell expansions:

• Brace expansion: Expansions of expressions within {}.
• Tilde expansion: Expansion of ~ to a user’s home directory.
• Parameter and variable expansion: How bash expands the variables.
• Command substitution: Uses the output of a command as text.
• Word splitting: How the results of expansion are split into separate entities or words.
• Arithmetic expansion: How arithmetic expands
• Filename expansion: How globs are expanded

Shell Expansion Order

Brace expansion → Tilde expansion → Parameter expansion → Variable expansion → Arithmetic expansion and command substitution

Pattern Matching

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