Best terminal tools

Inspect packets through a terminal interface to tshark

Simple incoming and outgoing bandwidth graphs in a terminal

A terminal mail interface with PGP/MIME and a Notmuch index

Watch Linux wireless-device signal and packet statistics

A console bandwidth view for interfaces and disk I/O

Combine traceroute and ping in an interactive diagnostic tool

Compact ping visualization using ordinary shell tools

Inspect Linux IP traffic and interface activity in a console

Network statistics in an interactive terminal or script output

A terminal mail client with GPG signing and encryption

A Mutt-derived terminal client with documented encryption configuration

A terminal mail client with PGP/MIME and extensive configuration