Capture command output into a variable.

Section: Parameter and Command Expansion

Command substitution

bash
bash
today=$(date +%F)
Explanation

Prefer $(...) over backticks for clarity and nesting.

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Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.

Related commands

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Arithmetic expansion
Evaluate an arithmetic expression.
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Get length of a variable's value.
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Substring expansion
Extract a substring by offset and length.
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Replace first match
Replace first matching substring.
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Replace all matching substrings.
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Strip shortest matching prefix pattern.
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