typeset:tldr:0ea3a

The command typeset -r ${variable}="${value}" sets a read-only attribute to the variable specified by ${variable} and assigns the value ${value} to it.

Here's a breakdown of the components of the command:

• typeset: This is a command used to define shell variables. In this case, it is being used to declare a read-only variable.

• -r: The -r option is used to set the read-only attribute to the variable. When a variable is read-only, its value cannot be changed or reassigned.

• ${variable}: This is the name of the variable to which the read-only attribute is assigned. The variable name is enclosed in ${} to indicate that it is a variable substitution.

• "${value}": This is the value assigned to the variable. It is enclosed in double quotes to preserve any spaces or special characters within the value. The value is also enclosed in ${} to indicate variable substitution.

Overall, the command typeset -r ${variable}="${value}" declares a variable as read-only and assigns a value to it.