coproc:tldr:512d8

The command you provided is using the coproc command in Bash to create a co-process. A co-process is a special type of background process that allows for bidirectional communication between the co-process and the main script or shell.

Here's a breakdown of the command structure:

1. {}: Enclosing the commands in curly braces {} creates a block of code, which allows multiple commands to be treated as a single entity.

2. ${command1; command2; ---}: This syntax executes multiple commands within the block. You can replace command1, command2, --- with actual shell commands you want to perform.

   For example, if you have three commands you want to execute in order: command1, command2, command3, you would write ${command1; command2; command3;} in the block.

3. coproc: The coproc command creates a co-process that will execute the code block defined by the curly braces {}.

Putting it all together, the command will create a co-process and execute the commands inside the curly braces as a single entity. The co-process will allow bidirectional communication with the main script or shell, so it can send and receive data.