lftp:tldr:8a75a

The command "mirror ${path-to-remote_dir} ${path-to-local_output_dir}" is likely referring to a command or script that is used to synchronize a directory on a remote server with a local directory.

The ${path-to-remote_dir} placeholder should be replaced with the actual path to the directory on the remote server that you want to mirror or synchronize. This could be something like /home/user/remote_directory.

Similarly, the ${path-to-local_output_dir} placeholder should be replaced with the actual path to the local directory where you want the mirrored or synchronized files to be stored. For example, this could be /path/to/local_output_directory.

When you execute the command, it will compare the contents of the remote directory with the local directory. It will detect any differences between the two directories (such as new files, modified files, or deleted files) and perform the necessary actions to make the local directory identical to the remote directory. This could involve downloading new or modified files from the remote server and deleting any files from the local directory that are no longer present on the remote server.

Overall, this command is useful for maintaining a consistent and up-to-date copy of a remote directory on a local machine.