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sha1sum:tldr:6b07d
The command "sha1sum" is a Linux command that is used to calculate the SHA-1 hash value of files.
In the given command, "${filename1 filename2 ---}" is used to represent a list of file names as input to the sha1sum command. The "filename1" and "filename2" are placeholders for actual file names.
The "---" after "filename2" is typically used to indicate the end of the list of file names. It specifies that there are no more file names after "filename2".
To execute the command, you need to replace "filename1" and "filename2" with the actual names of the files you want to calculate the SHA-1 hash for. Multiple file names can be included, separated by spaces.
For example, if you want to calculate the SHA-1 hash values of two files named "file1.txt" and "file2.txt", you would use the command: sha1sum file1.txt file2.txt
The command will then generate the SHA-1 hash values for each file and display them in the terminal.