scutil:tldr:35eb2

The command "scutil --set HostName ${hostname}" is used to set the hostname of a macOS system using the scutil command-line tool.

Here is what each part of the command does:

• "scutil" is the command-line tool in macOS used to manage system settings.
• "--set" is an option for the scutil command, indicating that we want to set a specific value.
• "HostName" is the hostname attribute that we want to modify. The hostname is the label assigned to a networked device or system, often used to identify it on a network.
• "${hostname}" is a placeholder for the desired hostname value. The "${hostname}" syntax is often used in shell scripting to refer to a variable named "hostname".

So, by running the command "scutil --set HostName ${hostname}", you are instructing macOS to set the system's hostname to the value stored in the variable "hostname". The actual value assigned to the variable will determine the new hostname of the system.