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In this section, we will take a look at variables in shell script.
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A variable is a value that can vary or change.
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A variable always has a
$sign before it's name. -
A variable name may only contain alphanumeric or underscores
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A variable is case sensitive as well.
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To set the value for a variable
$ mission_name=lunar-mission
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We can also use variables to store the result of another command and print it.
$ rocket_status=$(rocket-status $mission_name) $ echo "Status of launch: $rocket_status"
