rankmirrors:tldr:19cdb
The command "rankmirrors" is a utility in the Arch Linux operating system used to optimize the mirror list for downloading packages through the "pacman" package manager.
In the command you provided, the "--times" flag is used to rank the mirrors based on their response times. This means that the command will check the time it takes for each mirror to respond and prioritize the mirrors with the fastest response times.
The "${-etc-pacman-d-mirrorlist}" part of the command represents a variable that points to the location of the mirrorlist file. The mirrorlist file contains a list of mirrors from which Arch Linux downloads packages. By using this variable, the command instructs "rankmirrors" to read the mirrorlist file located at "/etc/pacman.d/mirrorlist".
Overall, the command "rankmirrors --times ${-etc-pacman-d-mirrorlist}" is used to rank the mirrors listed in the mirrorlist file based on their response times, improving the speed and efficiency of package downloads in Arch Linux.