handyfloss

Update: read second comment

I recently upgraded to [[Ubuntu]] Jaunty Jackalope, and have experienced a much slower response of my desktop since. The problem seems to be with [[Intel GMA]] chips, as my computer has. The reason for the poor performance is that Canonical Ltd. decided not to include the [[UXA]] acceleration in Jaunty, for stability reasons (read more at Phoronix).

The issue is discussed at the Ubuntu wiki, along with some solutions. For me, the fix involved just making [[X.Org Server|X.org]] use UXA, by including the following in the xorg.conf file, as they recommend in the wiki:

Section "Device"
        Identifier    "Configured Video Device"
        # ...
        Option        "AccelMethod" "uxa"
EndSection

Well, not much of a “plan”, but bear with me.

Ever since using [[Debian]] and [[Ubuntu]], I have installed the OS just once per computer. All software upgrades, including full releases, have been done through upgrades, not re-installations. This means that I have never actually had the need to download any ISO besides the first one used when I bought the computer.

This is fine, but I always felt the compulsion to share my bandwidth with fellow Linux users, and relieve some load from the [[Canonical Ltd.]] servers. So for every new Ubuntu release, I have downloaded one or more (amd64, i386, desktop, alternate…) Ubuntu CD ISOs via BitTorrent, and kept them uploading for some time. However, the full BT download of the ISO is a waste of bandwidth, and unless my later upload share is greater than 1.0, I will have been overloading the servers, not relieving them.

Now, with Jaunty Jackalope, I have a way to fix this. I could have done similarly with previous releases, but I didn’t. Here’s the deal: download the ISO and share it with BitTorrent, but don’t upgrade from the Internet as well. Upgrade from the ISO I just downloaded! In the past I would be reluctant to do this, among other things because I don’t want to waste a physical CD for that. However, the Ubuntu upgrade instructions say how to mount the ISO (yes, mounting ISOs is not new. I’ve done it in the past), then upgrade from the mounted image. Once the upgrade is done, I can keep seeding the ISO with BitTorrent.

With this procedure I can use bandwidth more efficiently (I download the required software just once), and I can still share the ISO with other people. Moreover, there is another plus: the ISO is just 699 MB, whereas the upgrade manager in Ubuntu tells me that for the upgrade I will need to download more than 1 GB! The difference is due to the ISO being somehow compressed, I think. I will report on the size of the file system mounted from the ISO (which should be much more than 1 GB).

Update: Well, actually the internet upgrade involves more packages. If you upgrade from the CD, you are still required to download 800 more MB to complete the upgrade, so no magic there.

I recently started looking for some system/format to dump personal stuff on. I checked my own comparison of wiki software, and chose [[MoinMoin]].

I have already installed some [[MediaWiki]] wikis for personal use, and I consider it a really nice wiki system. However, one of its strengths is also a drawback for me: the backend is a database. I want to be able to migrate the wiki painlessly, and with MediaWiki this is not possible. There is no end to the files and database dumps one has to move around, and then it is never clear if there is still something missing (like edit history or some setting). I want to have a single dir with all the data required to replicate the wiki, and I want to [[rsync]] just this dir to another computer to have an instant clone of the wiki elsewhere. MoinMoin provides just that (I think, I might have to change my mind when I use it more).

So here you are the steps I took to have MM up and running in my Ubuntu 8.10 PC.

Installation

Ubuntu has packages for MM, so you can just install them:

Configuration

Create a dir to put your wiki. For example, if you want to build a wiki called wikiname:

We made it a subdir of a global dir “MoinMoin”, so we can create a wiki farm in the future.

Next you have to copy some files over:

If installing a wiki farm, you could be interested in the contents of /usr/share/moin/config/wikifarm/, but this is out of the scope of this post.

The next step is to edit wikiconfig.py to our liking. The following lines could be of interest:

sitename = u’Untitled Wiki’
logo_string = u’‘
page_front_page = u”MyStartingPage”
data_dir = ‘./data/’
data_underlay_dir = ‘./underlay/’
superuser = [u”yourusername“, ]
acl_rights_before = u”iyourusername:read,write,delete,revert,admin”

Using

You just need to run wikiserver.py, there is no need to have [[Apache HTTP Server|Apache]] running or anything (like with, e.g., MediaWiki):

Then open your favourite browser and go to http://localhost:8080, and you will be greeted by the starting page.