ping6:tldr:76bdf

The command "ping6 -n ${host}" is used to test the reachability and latency of a network host using IPv6 protocol. Here's an explanation of each component:

• "ping6": It is a command-line utility used to send ICMP (Internet Control Message Protocol) echo requests to a specified network host and receive corresponding echo replies. It is primarily used for troubleshooting network connectivity issues.
• "-n": This option is used to set the number of ICMP echo requests to be sent to the host. In this case, it seems no number is specified, so it will likely default to continuous pinging until manually stopped by the user.
• "${host}": This variable is used to specify the network host or the IPv6 address you want to ping. The "${host}" portion signifies that the value of the host variable will be used in this command. It should be replaced with the actual hostname or IPv6 address you want to ping.

Overall, the command "ping6 -n ${host}" is used to continuously ping a specified host using IPv6 protocol without specifying a specific number of ICMP echo requests.