crunch:tldr:90e15
This command uses the "crunch" tool with two parameters passed to it.
The command "${1}" represents the first parameter passed to the script or the command itself. The content represented by "${1}" will be used as the starting point or lower limit for the generation of a numeric or alphanumeric sequence by the "crunch" tool.
The command "${3}" represents the third parameter passed to the script or command. The content represented by "${3}" will be used as the ending point or upper limit for the sequence generation by the "crunch" tool.
Overall, this command instructs the "crunch" tool to generate a sequence starting from "${1}" and ending at "${3}". The specific nature or pattern of the generated sequence will depend on the capabilities and settings of the "crunch" tool.