
md5sum:tldr:ce782
In this command, ${command}
represents a placeholder for an actual command that you can replace with your desired command. The vertical bar (|
) is known as a pipe and is used to redirect the output of the command preceding it to the command following it.
md5sum
is a command-line utility in Linux and Unix-like operating systems that calculates and displays the MD5 hash value of a file. MD5 is a cryptographic hash function that takes an input (in this case, the output of ${command}
) and produces a fixed-size output (128-bit hash value). The generated hash value is commonly used to verify data integrity or for security purposes.
So, when you run the ${command} | md5sum
command, it executes the specified command and pipes its output to md5sum
. md5sum
then calculates the MD5 checksum of the input data, usually a file or text stream, and displays the corresponding hash value on the output.