First of all I’d like to thank TuxArena’s readers for giving good feedback in the first part of this series, which overviews 15 of the tools I consider particularly useful in a console. This article overviews 10 more such tools, and most of them were suggested by you. Screenshots included.

telnet
telnet is a well-known command-line tool which uses sockets to open a TCP connection to the specified hostname and port. telnet can be primarily used for non-secure connections to connect to a HTTP server and get a file or to an IRC server for example. Escape character in telnet is ^] (press Ctrl+])
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rtorrent
I’ve never used a BitTorrent client in command-line mode (KTorrent is my application of choice), so rtorrent was something new to me. However I heard about rtorrent many times and decided to take it for a spin. The only reason for choosing it over ctorrent was that everybody mentions it when it comes to command-line tools. Well, after starting it I had trouble quitting it (:q, q, ^X followed by quit or exit didn’t seem to work), so I had to Google for it. The command for exiting rtorrent is ^Q (Ctrl+Q). rtorrent features pausing/resuming torrents, and it features most of the features found in graphical clients like Deluge or KTorrent.
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vifm
vifm is a twin-panel file manager using ncurses and Vi keyboard shortcuts. I recommend it to those who are used to work in Vi (this is why I recommend CMus for them too, because of the keyboard shortcuts).
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emacs
Yes, Emacs can be run in command-line mode too, if it is invoked with emacs –no-window-system, or with emacs –no-window, or just with emacs -nw. For those of you don’t know what Emacs is: well, first of all it is a very powerful IDE (Integrated Development Environment) written in Elisp (Emacs Lips, a List dialect). It features syntax highlighting, indentation, so-called “modes” for various languages (including C or Java modes). Emacs is extremely flexible, comes with a huge number of configuration options (which can be used either from within the application or in the ~/.emacs configuration file), and it can be expanded using Lisp. Except for being an IDE, it also provides email client, facilities to use it as a file manager, IRC access, and much, much more. As they describe it on the website, Emacs can be look at just as it would’ve been an operating system.
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mutt
mutt is a pretty powerful command-line email client. It has support for color terminals, MIME, OpenPGP.
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iptraf
iptraf is a network interface monitoring tool. It displays various informations on the incoming/outgoing traffic on the installed networking interfaces, statistics and general info.
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screen
GNU Screen is used to run multiple programs in a terminal, without the need to open several terminal tabs, so it would be a perfect fit to run in the F1-F6 classic ttys. Screen creates several virtual terminals and allows you to customize and switch between them. This tool is definitely a must-have for any respectable power user.
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tail
tail is a simple tool that will display by default the last 10 lines in a text file. By invoking it with a number parameter, it will display n lines starting at the end of the file (e.g. tail -20 to display the last 20 lines in a file). tail is useful to see the output of long logs.
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wget
wget is the “de-facto” command-line utility to download files over Internet, supporting the following protocols: HTTP, FTP, HTTPS and HTTP through proxies. It provides for many options, including quiet mode, verbose or non-verbose mode, resume downloading an incomplete file, set the number of retries, and these are not the only ones.
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hnb
hnb stands for Hierarchical Notebook, it is written using ncurses, and it allows you to keep notes in a console.
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In the next article in these series I will talk about ssh, scp and several other powerful and useful tools.