sum:tldr:863dd
sum: Compute a checksum with System V-compatible algorithm and 512-byte blocks.
$ sum --sysv ${filename}
try on your machine
The sum command is used to calculate a checksum value for a given file. The specific command you provided, sum --sysv ${filename}, calculates the System V style checksum for the file specified by ${filename}.
The --sysv option tells the sum command to generate a checksum value using the System V algorithm. This algorithm calculates a 16-bit value by summing up all the bytes in the file and taking the least significant 16 bits of the sum. It is a commonly used checksum algorithm in Unix-like systems.
${filename} is a placeholder representing the name of the file for which you want to calculate the checksum. You need to replace ${filename} with the actual name or path of the file you want to calculate the checksum for.
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.