numfmt:tldr:120bb

The command numfmt --from=${si} ${1-5K} is used to format numbers according to the International System of Units (SI) conventions.

Here is a breakdown of the command:

• numfmt: It is a command-line tool that is used to format or convert numbers.
• --from=${si}: This option tells numfmt to convert the numbers from the specified format. In this case, ${si} is a placeholder for an argument that specifies the format. The ${si} likely refers to the SI format, which means numbers will be formatted using SI prefixes such as kilo, mega, giga, etc.
• ${1-5K}: This is another placeholder for an argument that specifies the range or list of numbers to be formatted. In this case, it is representing a range between 1 and 5K (K = kilo, which means 1,000). So, this command will format numbers from 1 to 5,000 according to the SI conventions.

Overall, the command is used to convert and format numbers within a specific range using SI prefixes. The actual values of ${si} and ${1-5K} would depend on the context in which this command is being used.