b2sum:tldr:5c109

This command is using the b2sum utility in Linux to compute the BLAKE2 checksums of one or more files and store the result into another file.

Here's a breakdown of the command:

• b2sum: This is the command-line utility used to compute the BLAKE2 checksums.
• ${filename1 filename2 ---}: These are placeholder values for the names of the files you want to compute the checksums for. Each filename should be separated by a space. The --- indicates that you can specify any number of files.
• >: This is the output redirection operator. It redirects the output of the command to a file instead of displaying it on the screen.
• ${filename-b2}: This is the name of the file where the checksums will be stored. You can replace ${filename-b2} with the desired filename.

To use this command, you would replace ${filename1 filename2 ---} with the actual filenames, and ${filename-b2} with the desired output filename.

For example, if you have two files named file1.txt and file2.txt, and you want to compute the checksums and store the result in a file named checksums.txt, you would run the following command:

b2sum file1.txt file2.txt > checksums.txt

After the command executes, the checksums of file1.txt and file2.txt will be calculated and saved in the checksums.txt file.