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declare:tldr:999de
declare: Declare a readonly string variable with the specified value.
$ declare -r ${variable}="${value}"
try on your machine
This command is used to declare and define a read-only shell variable in a script.
Here's a breakdown of the command:
declare
: This is a shell built-in command used to declare and set attributes for variables.-r
: This is an option for thedeclare
command, which sets the variable as read-only.${variable}
: This is the name of the variable you want to declare and define. It is enclosed in curly braces ({}
) to help the shell interpret the variable name correctly."${value}"
: This is the value assigned to the variable. It can be any valid value, and it is enclosed in double quotes (""
) to preserve any spaces or special characters that might be part of the value.
So, when you run this command, it declares a read-only variable named ${variable}
and assigns it the value ${value}
. Once the variable is declared read-only, you won't be able to modify its value later in the script.
This explanation was created by an AI. In most cases those are correct. But please always be careful and
never run a command you are not sure if it is safe.