This post covers the utilities those start with digits. Part of the useful ubuntu utility glossary series.
- 2ping (Networking) : Bi-directional ping utility that applies 3-way pings (TCP 3-way handshake) to determine packet loss in a particular direction.
- 4g8 (Networking) : Sniffs (captures) packets over switched networks from a third party. Works with multiple networks.
- 6tunnel (Networking) : 6tunnel allows you to use services provided by IPv6 hosts with IPv4-only applications and vice-versa. It can bind to any of your IPv4 (default) or IPv6 addresses and forward all data to IPv4 or IPv6 (default) host.