bzip2:tldr:358d3
The command "bzip2 ${filename_to_compress}" is using the bzip2 utility to compress a file.
Here's a breakdown of the command:
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"bzip2": This is the name of the command/utility being used. It is a file compression program commonly used in Unix-like systems.
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"${filename_to_compress}": This is a placeholder for the actual filename that you want to compress. The ${filename_to_compress} should be replaced with the desired file name (including the path if necessary) before executing the command.
When you run this command with the actual filename, bzip2 will compress the specified file using the bzip2 compression algorithm, which is known for its high compression ratio. The compressed file will have the same name as the original file but with the ".bz2" extension added to it. For example, if you run this command on a file named "example.txt", the resulting compressed file will be named "example.txt.bz2".