mirror of https://github.com/CrimsonTome/tldr.git
21 lines
596 B
Markdown
21 lines
596 B
Markdown
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# envsubst
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> Substitutes shell format strings with environment variables in text.
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> Strings to be replaced should be in either `${var}` or `$var` format.
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- Replace environment variables in stdin and output to stdout:
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`echo '{{$HOME}}' | envsubst`
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- Replace environment variables in an input file and output to stdout:
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`envsubst < {{path/to/input}}`
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- Replace environment variables in an input file and output to a file:
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`envsubst < {{path/to/input}} > {{path/to/output}}`
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- Replace environment variables in input from a space-separated list:
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`envsubst {{variables}} < {{path/to/input}}`
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