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Bash — The alias Built-in
Bash aliases let you turn long, frequently used commands into short, memorable shortcuts. Learn how alias works, how to create, inspect, remove, and persist aliases, and when a function or script is a better choice.
Bash — The eval Built-in
> **Learn what Bash’s `eval` really does, why it performs a second round of shell parsing, how it enables dynamic commands and variables, and why that same power can create serious security risks. Explore safer alternatives such as arrays, functions, and indirect expansion.**
Bash — The echo Built-in
Explore Bash’s echo built-in: print text and variables, control newlines, use escape sequences, handle quoting and special characters, and avoid common pitfalls. Plus, learn when printf is a better choice for precise and predictable output.
