Blogging is futile

abe@debian.org

abe+blog@deuxchevaux.org (Axel Beckert) — Sun, 31 Jan 2010 23:58:34 +0100

On Wednesday I got DAM approval and since Saturday late evening I’m officially a Debian Developer. Yay! :-)

My thanks go to

Christoph Berg (Myon) whom I know for more than a decade since we studied together, and who’s career in Debian was way faster than mine, but who on the other hand probably knows me better than nobody else in Debian — which made him the perfect advocate;
Bernd Zeimetz (bzed) whom I know from my times at DaLUG and who was the friendliest Application Manager I could imagine — he’s probably also one of the fastest (8 days from application to AM report :-);
Luca Capello (gismo), who was the most demanding but also most inspiring sponsor I ever had and who became a very good friend after we found each other over my package conkeror.
Arne Wichmann (Y_Plentyn) for being my first drop-in center for Debian questions (like “can I directly dist-upgrade from 2.0 to 3.0?” :-);
Martin Zobel-Helas (zobel) who was always encouraging me to continue exploring new sides of Debian;
Gerfried Fuchs (Rhonda) just for being there (and for being a package maintainer with good relations to upstream ;-);
my coworkers at the IT Services Group of the Department of Physics at ETH Zurich, who always found new challenges in Debian for me to solve;
… and all those others who offered to also advocate me (e.g. Otavio Salvador) or sponsored my packages so far (or at least offered to do so), e.g. Alexander Wirt (formorer), Martin F. Krafft (madduck), Robert Jördens (jordens), …

As Bernd cited in his AM report, my earliest activity within the Debian community I can remember was organising the Debian booth at LinuxDay.lu 2003, where I installed Debian 3.0 Woody on my Hamilton Hamstation “hy” (a Sun SparcStation 4 clone).

I wrote my first bugreport in November 2004 (#283365), probably during the Sarge BSP in Frankfurt. And my first Debian package was wikipedia2text, starting to package it August 2005 (ITP #325417).

My only earlier documented interest in the Debian community is subscribing to the lists debian-apache@l.d.o and debian-emacsen@l.d.o in June 2002.

I though remember that I started playing around with Debian 2.0 Hamm, skipping 2.1 (for whatever reasons, I can’t remember), using 2.2 quite regularily and started to dive into with Woody which also ran on my first ThinkPad “bijou”. I installed it over WLAN with just a boot floppy at the Chemnitzer Linux-Tage. :-)

Anyway, this has led to what it had to lead — to a new Debian Developer. :-)

The first package I uploaded with my newly granted rights was a new conkeror snapshot. This version should work out of the box on Ubuntu again, so that conkeror in Ubuntu should not lag that much behind Debian Sid anymore.

In other News

Since Wednesday I own a Nokia N900 and use it as my primary mobile phone now. Although it’s not as free as the OpenMoko (see two other recent posts by Lucas Nussbaum and by Tollef Fog Heen on Planet Debian) it’s definitely what I hoped the OpenMoko will once become. And even if I can’t run Debian natively on the N900 (yet), it at least has a Debian chroot on it. :-)

A few weeks ago, I took over the organisation of this year’s Debian booth at FOSDEM from Wouter Verhelst who’s busy enough with FOSDEM organisation itself.

Last Monday the organiser of the BSD DevRoom at FOSDEM asked on #mirbsd for talk suggestions and they somehow talked me into giving a talk about Debian GNU/kFreeBSD. The slides should show up during the next days on my Debian GNU/kFreeBSD talks page. I hope, I’ll survive that talk despite giving more or less a talk saying “Jehova!”. ;-)

What a week.

/var/cache/apt/ on tmpfs

abe+blog@deuxchevaux.org (Axel Beckert) — Sun, 01 Nov 2009 16:44:49 +0100

My ASUS EeePC 701 (4G) “nemo” running Debian Sid has a 4 GB SSD as main disk, which is on the one hand quite full (mostly with software I use, but also local working copies of software I work on) and on the other hand an SSD, so I always try to reduce the amount of write to disk without losing convenience. Similar issues have systems which run off a CF or SD card or maybe even an USB stick.

Since I ordered a 2 GB RAM bar together with the EeePC, I not bound to the 512 MB which it had originally. But on the other hand I seldom needed more than 1 GB of RAM. Usually I needed between 400 MB and 1 GB of RAM. So it’s quite obvious to use tmpfs on as many places as possible.

Making /tmp, /var/run and /var/lock tmpfs were the most obvious directories to mount as tmpfs. Especially /var/run on tmpfs brought up a few bugs a while ago (mostly init.d scripts relying on /var/run/$PACKAGENAME/’s existence), but it’s no hassles to use nowadays. Even in Debian Stable such bugs got fixed.

Next target to explore for was /var/cache. According to the FHS, /var/cache is intended for cached data from applications. […] The application must be able to regenerate or restore the data. So it should be safe to put anything under /var/cache on tmpfs.

One directory in there which gets written quite often and with a lot of data on Debian Unstable is /var/cache/apt and its subdirectories, especially /var/cache/apt/archives. If you update your Sid installation daily, all new or updated .debs will be downloaded to /var/cache/apt first.

So I put /var/cache/apt on tmpfs by putting the following line into /etc/fstab:

tmpfs /var/cache/apt tmpfs defaults,noexec,nosuid,nodev,mode=0755 0 0

But despite FHS stating that anything under /var/cache must be reproducible by the application, apt is puking and refusing to work:

!447 Z31 ?0 L1 root@nemo:pts/0 (-zsh) 16:13:10 [~] # apt-get update
E: Archive directory /var/cache/apt/archives/partial is missing.
!448 Z32 ?100 L1 root@nemo:pts/0 (-zsh) 16:13:17 [~] #

If you create /var/cache/apt/archives/partial, it will also argue about /var/cache/apt/partial.

Of course the workaround is simple: Just put mkdir -p /var/cache/apt/partial /var/cache/apt/archives/partial in /etc/rc.local.

But nevertheless, this is a bug in apt – which already has been reported by madduck earlier this year (#523920). Unfortunately the APT maintainers have not yet even commented on this FHS violation and therefore also a Debian Policy (Section 9.1.1) violation.

One more thought about /var/cache/apt vs only /var/cache/apt/archives: apt-file also caches its data under /var/cache/apt. So if you want to use apt-file after a reboot and have /var/cache/apt mounted as tmpfs, you have to run apt-file update first and it will download all Contents files (can be dozens of megabytes) and not only the differences to previously downloaded Contents files.

So if you use apt-file a lot, you probably go better with making only /var/cache/apt/archives tmpfs and not whole /var/cache/apt.

Useless Statistics, the 2nd

abe+blog@deuxchevaux.org (Axel Beckert) — Wed, 15 Apr 2009 18:05:16 +0200

Myon recently posted a nice statistic about popular single letter package name prefixes. Just out of curiosity I started wondering about popular single letter package name suffixes:

On a machine with Debian oldstable, stable, testing, unstable and experimental in its sources.list, I ran the following command:

$ apt-cache search -n . | \
    awk '{print $1}' | \
    sed -e 's/.$//' | \
    sort | \
    uniq -c | \
    sort -n

And to my surprise there is a non-obvious winner:

$ apt-cache search -n '^gp.$'
gpa - GNU Privacy Assistant
gpc - The GNU Pascal compiler
gpe - The G Palmtop Environment (GPE) metapackage
gpm - General Purpose Mouse interface
gpp - a general-purpose preprocessor with customizable syntax
gpr - GUI for lpr: print files and configure printer-specific options
gps - Graphical Process Statistics using GTK+
gpt - G-Portugol is a portuguese structured programming language
gpw - Trigraph Password Generator

But since I searched through the binary packages many other hits are more obvious, like the seven packages hbf-cns40-1 to hbf-cns40-7:

      [...]
      4 ar
      4 aspell-f
      4 automake1.
      4 cpp-4.
      4 e
      4 g++-4.
      4 gappletviewer-4.
      4 gcc-4.
      4 gcj-4.
      4 gcompris-sound-e
      4 gfortran-4.
      4 gij-4.
      4 go
      4 gobjc-4.
      4 gobjc++-4.
      4 h
      4 iceweasel-l10n-e
      4 iceweasel-l10n-k
      4 kde-i18n-f
      4 kde-i18n-h
      4 kde-l10n-e
      4 kde-l10n-s
      4 kile-i18n-e
      4 koffice-i18n-e
      4 koffice-i18n-s
      4 koffice-l10n-e
      4 koffice-l10n-f
      4 libqbanking
      4 myspell-f
      4 myspell-h
      4 openoffice.org-help-e
      4 openoffice.org-l10n-b
      4 openoffice.org-l10n-h
      4 openoffice.org-l10n-k
      4 sd
      4 tcl8.
      4 tk8.
      5 aspell-e
      5 aspell-h
      5 iceweasel-l10n-s
      5 kde-i18n-b
      5 kde-i18n-e
      5 kde-i18n-t
      5 kde-l10n-k
      5 openoffice.org-l10n-e
      5 openoffice.org-l10n-t
      5 pa
      5 tc
      6 gc
      6 kde-i18n-s
      6 libdb4.
      6 m
      6 openoffice.org-l10n-n
      6 openoffice.org-l10n-s
      6 s
      7 hbf-cns40-
      9 gp

But there are also some other interesting observations to make:

OpenOffice.org seems to have by far the biggest number of localisations, with KDE being 2nd.
There are 6 version of the Berkeley DB in Debian: libdb4.2 to libdb4.7 (including oldstable as mentioned above)

I leave it as an exercise to the reader to find the full names of the other package names starting with s, m, gc, pa or tc and having just one additional character. ;-)

Tablet Amora runs on the OpenMoko FreeRunner (updated)

abe+blog@deuxchevaux.org (Axel Beckert) — Wed, 21 Jan 2009 19:36:41 +0100

Amora (“A MObile Remote Assistant”) is a client/server suite which allows you to remote control an X desktop using a bluetooth enabled mobile phone. Initially there was only a Symbian client (running e.g. on nearly all Nokia E and N series phones), but J2ME clients are under developement, too.

Then there is Tablet Amora (aka Tamora), an Amora “proof of concept” client for the Maemo platform which runs on internet tablets like e.g. the linux based Nokia N770, N800, and N810. Since Maemo isn’t that far away from what runs on the OpenMoko, getting Tamora working on the OpenMoko, too, suggested itself.

Maemo seems to use the deb package format, too, just slightly extended (e.g. by package icons), so it wasn’t even that hard work to adapt the existing Maemo packaging to build, install and run on Debian, too.

So that’s how Tamora looks on the OpenMoko:

The packaging is still far away from Debian standards (throws tons of lintian warnings and the source package generation is b0rked), so yet there are no prebuilt debs available, but you can checkout amora-client from the Subversion repository and build the package from there:

 $ svn checkout http://amora.googlecode.com/svn/trunk/amora-client/maemo/ amora-client
 $ cd amora-client
 $ debuild -uc -us
 $ cd ..
 # dpkg -i amora-client_0.1-2maemo+openmoko_all.deb

For running and installing tamora you need packages from the pkg-fso APT repository on alioth. And to build it, you need the libedje-bin which is available from the pkg-fso repository for at least the armel architecture, or else from Debian experimental. You can add these repositories to your sources.list as follows:

 # PKG FSO repository
 deb     http://pkg-fso.alioth.debian.org/debian unstable main
 deb-src http://pkg-fso.alioth.debian.org/debian unstable main

 # Debian Experimental
 deb     http://ftp.ch.debian.org/debian experimental main
 deb-src http://ftp.ch.debian.org/debian experimental main

Since Tamora is yet only a “proof of concept” client, currently only the following remote functions are available:

pressing arrow key right/left
pressing F5 (fullscreen for the OpenOffice.org Presenter)

This should though at least suffice for a presentation with the OpenOffice.org Presenter.

To use Tamora to remote control your Debian laptop, you need a bluetooth dongle (or builtin bluetooth support) and amora-server installed as with the Symbian S60 (3rd Edition) Amora client, too.

Update, 23:51

libedje-bin seem not available in the pkg-fso repository for every architecture. You’ll also find it in Debian experimental. Updated the sources.list section above appropriately. Thanks to Sebastian Montini for pointing out this problem.

Conkeror in the Debian NEW queue

abe+blog@deuxchevaux.org (Axel Beckert) — Tue, 01 Jul 2008 21:39:11 +0200

I already mentioned a few times in the blog that I’m working on a Debian package of the Conkeror web browser. And now, after a lot of fine-tuning (and I still further new ideas how to improve the package ;-) Conkeror is finally in the NEW queue and hopefully will hit unstable in a few days. (Update Thursday, 03-Jul-2008, 18:13 CEST: The package has been accepted by Jörg and should be included on most architectures in tonight’s updates.)

Those who could hardly await it can fetch Conkeror .debs from http://noone.org/debian/. The conkeror package itself is a non-architecture specific package (but needs xulrunner-1.9 to be available), and its small C-written helper program spawn-process-helper is available as package conkeror-spawn-process-helper for i386, amd64, sparc, alpha, powerpc, kfreebsd-i386 and kfreebsd-amd64. There are no backported packages for Etch available, though, since I don’t know of anyone yet, who has successfully backported xulrunner-1.9 to Etch.

Interestingly the interest in Conkeror seems to have risen in the Debian community independently of its Debian packaging. Luca Capello, who sponsored the upload of my Conkeror package, pointed me to two blog post on Planet Debian, written by people being fed up with Firefox 3 already and are looking for a more lean, but still Gecko based web browser: Decklin Foster is fed up with Firefox’ -eh- Iceweasel’s arrogance and MJ Ray is fed up with Firefox 3 and its SSL problems.

Since my previously favourited Gecko based web browser Kazehakase never became really stable but instead became slow and leaking memory (and therefore not much better than Firefox 2), I can imagine that it’s no more an candidate for people seaking for a lean and fast web browser.

Conkeror has some “strange” concepts of which the primary one is that it looks and feels like Emacs:

The current location is shown in a status bar below the website, where Emacs usually shows buffer names. All input, even entering new URLs to go to, is done via the mini-buffer, an input line below the status bar.
Instead of tabs it uses Emacs’ concept of buffers. So no tab bar clutter and though easy access to all currently open pages.
It has no buttons, menu-bar or such. And except the status bar and mini-buffer, it uses the whole size of the window for the displayed web page. This is the main reason why I prefer Conkeror on the 7” EeePC: I don’t want to waste any pixels for buttons or menu bars and still have a fully functional web browser.
It of course has Emacs alike keybindings (with a slight touch of Lynx). While this may seem awkward for the vi world (Hey, they have the vimperator^*, also in Debian since a few days!), as an Emacs user you just have to remember that you web browser now also expects to be treated like an Emacs. It just works:

C-x C-c
Exit Emacs -eh- Conkeror

C-x C-f
Open File -eh- web page in new buffer

C-x C-b
Change to some other tab -eh- buffer

C-x C-v
Replace web page in this buffer and use the current URL as start for entering the new one

C-x 5 2
Open new frame -eh- window

C-x 5 0
Close current frame -eh- window

C-x k
Close tab, -eh- kill buffer

C-h i
Documentation

C-s
Incremental search forward

C-r
Incremental search backward

C-g
Stop

l
Go back (Think info-mode)

g
Go to (Open web page in this buffer)

(Hehe, I like the faces of vi users having read these keybindings and now wondering how to remember them. SCNR. Well, sometimes vi key bindings are a mystery to me, too. :-)
There are of course many more and nearly all are the same as in Emacs, even the universal argument C-u and the M-x command-line are there. E.g. C-u g lets you open a web page in a new buffer, too.
Conkeror also has very promising concept for following and copying links with the keyboard only. Opera is very inefficient here since you have to jump from link to link to get to the one you want. In Conkeror you just press f for following or c for copying links and then all links on the currently shown part of the page show a small number attached to it. Then you just enter the number (and additionally press enter if the number is ambigous) and the link is either opened or copied to the clipboard.
A funny anecdote about how this concept grew over the time: Early versions of Conkeror (back in the days when it just was a Firefox externsion as vimperator) numbered all links on the page, not only the visible ones. On large pages with many links or buttons (e.g. my blog ;-), this took minutes to complete. The idea to just number the visible links is so simple and important – but someone first needed to have it. :-)

Footnotes

*) I just noticed that there is now also muttator, making Thunderbird look and behave like vim (and probably also mutt), too. Wonder into which e-mail client the Emacs community will convert Thunderbird. GNUS? RMAIL? VM? Wanderslust? What will it be called? Wunderbird? Thunderslust? (SCNRE ;-)

Axel's Cruftiness Theorem

abe+blog@deuxchevaux.org (Axel Beckert) — Fri, 14 Mar 2008 19:20:24 +0100

Theorem: If aptitude is used, set to automatically remove unneeded packages and every not willingly installed package is marked auto, the system’s cruftiness is always 0.

Segmentation faulty tree

abe+blog@deuxchevaux.org (Axel Beckert) — Mon, 28 Jan 2008 21:28:24 +0100

aptitude on Etch just gave me a funny error message:

1/0/0 root@c2:pts/2 21:14:24 [~] # aptitude upgrade 
Reading package lists... Done
Segmentation faulty tree... 87%
2/139/0 root@c2:pts/2 21:14:43 [~] #

Ctrl-Ms can be nice sometimes…