Load file into array

bash

mapfile -t lines < file.txt

Explanation

mapfile and readarray are Bash builtins.

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

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Read one line from stdin with a prompt.

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Read secret input without echoing characters.

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Parse delimited input into multiple variables.

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Create an indexed array.

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Declare an associative array.

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Read an array element by index.

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