lzip:tldr:8554a

The command "lzip" is used to compress files using the Lzip compression algorithm. Lzip is a lossless data compression program that provides very high compression ratios and uses a sliding dictionary compression algorithm similar to that of Lempel-Ziv-Markov chain-Algorithm (LZMA).

Here is the breakdown of the command:

• "lzip" is the command to invoke the lzip compression program.
• "-k" is an option that tells lzip to keep the original file after compressing it. This is useful if you want to retain the original file alongside the compressed version.
• "${filename}" is a placeholder that represents the name of the file you want to compress. You need to replace it with the actual filename or the path to the file.
• "--best" is an option that instructs lzip to use the highest compression level available. This may result in a slower compression process but will likely provide better compression ratios.

Overall, the command compresses the specified file using lzip with the highest compression level and retains the original file after compression.