EN
Bash - read variable with default value
6 points
In this short article we would like to show how in Bash set default value for data read from terminal if data was not typed.
Quick solution:
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read username4
username=${username:-admin}5
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echo "Used username: ${username}"Where: admin word should be changed to desired value.
or with message:
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read -p "Username [admin]: " username4
username=${username:-admin}5
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echo "Used username: ${username}"
This section shows how to store default value in variable.
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default_username=Admin4
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read -p "Username [${default_username}]: " typed_username6
typed_username=${typed_username:-${default_username}}7
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echo "Used username: ${typed_username}"In this section we want to show how to assign default value with test command.
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read username4
test -z "${username}" && username=admin5
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echo "Used username: ${username}"
