radare2:tldr:27e30

The command > !${shell_command} is not a specific command in any particular shell, as it contains a variable ${shell_command} which could represent any shell command specified by the user.

However, based on the structure of the command, it seems to be redirecting the output of a shell command to the virtual command history feature provided by some shells, such as Bash.

In Bash, the ! character followed by a command allows you to refer to previous commands in the command history. When you precede it with > (output redirection operator), it redirects the output of the specified ${shell_command} to the command history without executing the command itself.

For example, if you have a previous command like ls -l, you can save its output to the command history without executing it by using > !ls -l. This allows you to recall the output of the command later if needed.

It is important to note that the behavior of this command can vary depending on the shell being used and how the virtual command history feature is implemented.