zstd:tldr:b5399

The command "zstd -${level} ${filename}" is a command-line command using the zstd program to compress a file with a specified compression level.

Here is the breakdown of the components of the command:

• "zstd": It is the name of the command-line program used for compressing and decompressing files using the Zstandard compression algorithm.
• "-${level}": It is an argument to specify the compression level. The "${level}" represents a variable that should be replaced with an actual value, typically an integer between 1 and 22, where 1 is the lowest compression level (fastest) and 22 is the highest compression level (slowest but with best compression ratio).
• "${filename}": It is another variable that should be replaced with the actual name or path of the file you want to compress.

So when you run this command with the variables replaced with real values, it will compress the specified file using the Zstandard algorithm with the specified compression level. The resulting compressed file will typically have the same name as the original file but with an added extension or a different file location unless you specify otherwise.