lrzip:tldr:c2841

The command lrzip ${filename} is used to compress the file specified by ${filename} using the lrzip utility. Here's a breakdown of what each part of the command does:

• lrzip: This is the name of the utility or command being executed. lrzip is a compression tool specifically designed for long-term archiving with high compression ratios.

• ${filename}: This is a placeholder for the actual file name. The ${} notation is often used in Unix-like systems (like Linux) to refer to variables. In this case, it would be replaced with the name of the file you want to compress.

When you run this command, lrzip will compress the specified file using its compression algorithm, resulting in a compressed archive of the file. The final archive will be named ${filename}.lrz, with the extension .lrz indicating that it's an lrzip compressed file.