— David Wagner 2008/12/10 00:09 Notes

I'm anxiously awaiting a used One Laptop per Child (OLPC) machine and intend to geek it out for productivity. Besides installing Debian Linux to match the distros on other systems around, this thing will need a nice collection of lightweight applications, most of them to run in monochrome mode.

One interesting twist is that I want to be able to use most of these offline, but synchronize them with online repositories when a connection is available. Email for messages and DokuWiki for most text-based data are reasonable choices for the online repositories to help keep things straight.

The LCD screen is rated at 200 dpi (square pitch at 152x114mm), and is 1200×900 grayscale. Because of the way this unusual dual-mode screen handles colors, the maximum maximum color resolution is about 984×738, but this has no effect on console applications (and little effect on any text application) since colors are resolved at the much grainier character cell resolution. A whole lot of 80×25 standard consoles can fit using small fonts; 7×9 looks like the most fun, with eight full consoles visible. However, 9×12 or 10×12 look more useful, and 8×14 is a common size.

The popular Terminus font is available in 6×12, 8×14, 8×16, 10×20, 12×24, 14×28 and 16×32; all but 6×12 include a bold face and EGA/VGA-bold is available in 8×14 and 8×16.

apt-get install console-terminus
apt-get install xfonts-terminus  #May or may not be needed

• Consola may be better. See this comparison of console fonts.
• Dina may be best for a bitmapped font; see this comparison.

It might be interesting to go for ultimate console application geekiness.

• http://www.cli-apps.org/

The screen console window manager can split a terminal screen into two console windows tiled vertically, and after upgrading to a more recent version, horizontally, too.

• Excellent tutorial
• Horizontal tiling has recently been added, though it seems http://savannah.gnu.org/screen.git has the best version.
  • Here is a brief discussion of how to install the better patched version.
  • The gnu project page should be the source for the better patched version.
  • It looks like compiling the 256 color version includes vertical split (~4.00.03+).
  • yum install screen does it on the OLPC (4.0.3).
  • It looks like Debian testing (lenny) has the version with vertical tiling (v4.03+). It was merged with CVS source on 02 Jun 2008, according to the Debian changelog. (The following installed it in an old iBook.)
    • Added Testing repostiory: deb http://http.us.debian.org/debian testing main
    • Needed to increase apt cache: $ sudo apt-get update -o APT::Cache-Limit=25165824. (I changed it in Synaptic)
    • Though dependencies seemed a bit excessive, I apt-get installed it: $ sudo apt-get install screen/testing -o APT::Cache-Limit=25165824.
• Good intro to screen
• Cheat sheet in PDF, ASCII, and LaTeX.
• Nice printed cheat sheet
• It may be better to change screen to use the backtick character instead of Ctrl-a. See this tips page for details. (Put escape ^`` in .screenrc.) Peronally, I think Ctrl-` might be better.

This is the default OLPC console shell.

Vim and Nano are already installed on the OLPC.

• Turn on spelling check while typing.

I plan to use a single application to aggregate messages from a variety of sources, download them for viewing offline, then use Vim with misspelling highlighting for writing replies.

So far, the best I've managed for an offline feedreader is to roll my own.

• yum install libxslt ncftp wget

cone: Basic mail and News Reader

• ssmtp: sendmail replacement
• sSMTP: A simple alternative to Sendmail
• Using mutt with ssmtp, getmail and maildrop
• Use getmail to get e-mail simply and securely
• Use sSMTP to send e-mail simply and securely
• Text-based e-mail with Alpine

su -
yum install ssmtp alpine  # aspell aspell-en are already installed
#ln -s /usr/local/ssmtp/sbin/ssmtp /usr/sbin/sendmail

It seems that getmail is not needed when using alpine?

Well, it looks like fifteen megabytes ofperl is necessary for sendmail.

• Email
  • Both alpine (21MB) and mutt (16MB) requires perl libs to install.
  • CONE for email and news also requires perl (18MB).
• alpine may have better news support than mutt.
• RSS Feeds (including weather forecasts and moon phases)
• Newsgroups

This is going to be more difficult than I'd hoped. One way to do this is to process news and mail into RSS feeds, then read them with a feedreader.

• Console Feedreader: Snownews, Raggle, or newsbeuter
• Email to RSS: Snowlist' (“requires an SQL database and a number of Perl modules[…]and is intended to be installed on a server”)
• Newsgroups to RSS: SLRNPull + SLRN +

Alternately, these can be fed into email.

• Console Mail Reader: Alpine has better newsgroup NNTP support than Mutt.
• RSS to Email: Feed2Imap or rss2mail (Perl), rss2email (Python) or Newspipe (Python) send items as emails, so you spend a lot of time playing with procmail.

• Newsgroups to Email: Not needed with Alpine.

This might be better combined with the aggregator.

• Calendar
  • wyrd: Wyrd acts as an ncurses-based frontend for remind, a scheduler application featuring sophisticated date calculation, moon phases, sunrise/sunset, Hebrew calendar, alarms, multilingual messages, and proper handling of holidays.
  • calcurse: CalCurse is a calendar and todo list for the console which allows you to keep track of your appointments and everyday tasks. CalCurse has a nice textmode interface with configurable color schemes, configurable layout and Vi-like keybindings.
  • pal: pal is a cal-like calendar with day highlight and support for events.
  • ccal: CCAL is a drop in replacement for the standard unix calendar program. It includes support for color and daily, weekly, and yearly reminders/appointments.
• Shopping List

Note try dates, a calendar optimised for embedded devices, for X-windows.

I decided to continue listening to podcasts through the iPod, rather than play them on the OLPC.

• bashpodder to get podcasts.
• GNUpod to sync and manage playlists.
• Update on iPod connect and download straight to it?
• See Download podcasts and sync music automatically with podget for some tips.

10 IRC Clients for Linux

• Maybe should just go with ircii for basic chat…
• yum install naim #only 256kB
• yum install weechat #5M: requires ruby and lua libs, but has spelling support
• irssi also requires about 15MB of perl libraries.
• The xo IRC client is OK under X, but doesn't seem to support identd.
• It may even be worthwhile to try sic or cobble something together with ii.

• yum install elinks
  • Only 1 MB install on stock OLPC
• w3m
  • Requires perl installation (15MB)
• lynx
• netrik

Have this running, if possible, in a full-screen console with a big, weird font. Under X-windows, try to set the background to a running game.

• yum install nethack

Though there is a medieval console font included with debian (I think), it does not seem to be available for an x-terminal.

• List of fonts in Debian, click on each for a sample.
  • For use in a big transparent x terminal, try flatline or wargames.

This is what the OLPC comes with, but I'll add an alternative to the Matchbook window manager and Sugar.

Here is an http://martin.ankerl.com/2007/09/01/comprehensive-linux-terminal-performance-comparison/interesting discussion of terminal emulators to use under x-windows. The winner for unicode high performance and low memory use is urxvt (see the comments).

apt-get install rxvt-unicode

There are too many window managers for me to spend the time trying them all. I like OpenBook, and will give it a shot first. Hopefully, I can configure it to open a cheat sheet with each console application.