pigz:tldr:00d0d

pigz: Compress a file using no compression and 4 processors.

pigz

$ pigz -0 -p${4} ${filename}

try on your machine

This command is using the "pigz" tool to compress a file in parallel using multiple threads. Here is the breakdown of this command:

"pigz": It is a parallel implementation of gzip compression utility that is used to compress files. It can greatly speed up the compression process by utilizing multiple CPU cores or threads.
"-0": This is an option that specifies the compression level to be used. In this case, a compression level of 0 is chosen, which means no compression. This option is used to create an uncompressed archive file.
"-p${4}": This option specifies the number of threads to be used for compression. The number is read from the fourth command-line argument passed to the script or command. The syntax "${4}" is used to access the fourth argument.
"${filename}": This is the filename or path of the file that you want to compress. It is passed as an argument to the command. The syntax "${filename}" is used to access the value of the "filename" variable.

To summarize, this command is compressing a file using the "pigz" tool with no compression (uncompressed) and using a specified number of threads for parallel processing, as determined by the fourth command-line argument.

This explanation was created by an AI. In most cases those are correct. But please always be careful and never run a command you are not sure if it is safe.

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