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shasum:tldr:bd1c6
The command "shasum" is used to compute the SHA checksum (or hash) of one or more files. The checksum is a unique alphanumeric string that represents the content of a file.
In this specific command, the "--algorithm 256" flag is provided to specify the SHA-256 algorithm, which is used to calculate the checksum.
"${filename1 filename2 ---}" indicates a placeholder where you should specify the filenames or paths of the files you want to calculate the SHA-256 checksum for. You can provide one or more filenames or paths, separated by spaces.
For example, if you want to calculate the SHA-256 checksum for two files named "file1.txt" and "file2.txt," you would execute the command as follows:
shasum --algorithm 256 file1.txt file2.txt
The command will then display the computed SHA-256 checksums for each file.