b2sum:tldr:35169

b2sum: Read a file of BLAKE2 sums and filenames and verify all files have matching checksums.

b2sum

$ b2sum --check ${filename-b2}

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The command "b2sum --check ${filename-b2}" is used to verify the integrity of a file using the b2sum algorithm. Here's an explanation of each part:

"b2sum" is the name of the command or program being executed. It is a utility that calculates and verifies checksums using the b2sum algorithm.
"--check" is an option or flag used to specify that the program should perform a check or verification operation. In this case, it instructs b2sum to check the file's checksum.
"${filename-b2}" is a variable enclosed in curly braces. It refers to the name of the file for which the checksum needs to be checked. The "-b2" portion is a modification applied to the filename. It likely indicates that the original filename has been modified to append "-b2" to it.

By executing this command, the b2sum program will calculate the checksum of the file with the name specified by the variable "${filename-b2}". It will then compare this checksum with the expected or previously calculated value to determine if the file's integrity has been maintained or if any data corruption has occurred.

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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