write:tldr:a57b9
write: Send a message to a given user on a given terminal id.
$ write ${username} ${terminal_id}
try on your machine
The given command seems to be using string interpolation or variable substitution with the variables "username" and "terminal_id".
In string interpolation, the values of variables are inserted into a string by enclosing them in a special syntax. In this case, the variables "${username}" and "${terminal_id}" are enclosed within "${}" (curly braces) and prefixed with "$" (dollar symbol).
This command likely intends to write the values of the "username" and "terminal_id" variables to an output or log. However, without additional context and knowledge of the specific programming or scripting language being used, it is difficult to determine the exact purpose or result of this command.
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.