Used for downloading files. Depending on how the website redirects, curl or wget may be easier to use.
Used to check to see if a host is up by sending ICMP packets.
Shows the different connections established between you and the destination. Useful for debuging routing issues.
Prints out DNS records for a specified domain
Dumps all TCP packets to output. Useful for a quick way to confirm that packets are indeed flowing.
Extremely useful tool for analyzing packet captures, does protocol parsing among other things.
Port scanner, can tell you what ports are open, as well as what protocol they are using.