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lrzip:tldr:e06be
The command "lrzip -b ${filename}" is used to compress a file using the lrzip utility with block checksums.
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"lrzip" is a compression utility that is designed to achieve high compression ratios for large files. It uses the Lzma (Lempel-Ziv-Markov chain algorithm) combined with the rzip (Run-length encoding and Burrows-Wheeler transform) to provide efficient compression.
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The "-b" option in the command is used to enable block checksums during compression. Block checksums help ensure the integrity of compressed files by verifying the data integrity of each compressed block. It provides an additional check to detect and handle potential data corruption during compression or decompression.
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"${filename}" is a variable that represents the name of the file you want to compress. You would replace "${filename}" with the actual name of the file you want to compress.
Overall, the command compresses the specified file using lrzip with block checksums enabled, providing a high compression ratio and ensuring data integrity through block checksums.