iperf:tldr:8aea4

This command is used to launch the iperf utility in "server" mode with certain options and parameters. Here is an explanation of each of the components:

• iperf: This is the command to launch the iperf utility.
• -u or --udp: This option tells iperf to use UDP (User Datagram Protocol) instead of the default TCP (Transmission Control Protocol). UDP is a simpler and faster protocol compared to TCP, but it does not guarantee delivery or reliability.
• -s or --server: This option sets iperf to run in server mode, where it waits for incoming client connections and measures the network performance between the server and client.
• -p or --port: This parameter specifies the port number to use. In this case, ${5001} indicates that the port number is 5001. The ${} syntax suggests that it is a variable, but in this case, it appears to be a literal value since there are no variables explicitly defined.

To summarize, this command launches iperf as a UDP server listening on port 5001, which can be used to measure network performance using UDP instead of TCP.