Monday
May182009

Ubuntu 9.04 Home Directories Readable by All 

Yesterday I was surprised to discover that, in my latest Ubuntu 9.04 system, each user's home directory was readable to all other users (ie: permissions "drwxr-xr-x"). I seem to remember that this was not so in Ubuntu 8.10 and earlier, so I can only assume that this is a result of the latest upgrade. Whether it was intentional or not, it is not what I want, so I fixed it by starting up a terminal console and entering:

sudo chmod o-rwx /home/*

Each user home directory now has permissions "drwxr-x---" and is only readable by that user.

[Edited 2012-11-15 to correct permissions.]

Monday
May182009

Egyptian Goose

Egyptian goose (Alopochen aegyptiacus).  This is the father of the 8 surviving Egyptian goslings on the large lake. 

Photo taken in Reading University grounds, Reading, UK, on 2009-05-17.

Sunday
May172009

Hoverfly

A hoverfly, probably a female Anasimyia lineata based mainly on the photo here. The males of this species seem to have much less grey on them, as shown here.

Photo taken in Reading University grounds, Reading, UK, on 2009-05-17.

Saturday
May162009

Capsid Bug

A capsid bug (family Miridae, order Hemiptera), probably Rhabdomiris striatellusBritish Bugs has some good photos of this species here, along with some of the similiar Miris striatus here.  Both of these species are often found on oak trees, as was the specimen pictured above.

Photo taken in Reading University grounds, Reading, UK, on 2009-05-10.

Thursday
May142009

Book Production in 16th Century Asia

As imagined by Orhan Pamuk in My Name is Red (translation by Erdağ M. Göknar):

Miraculously, however, Sultan Ibrahim Mirza's marvelous volume did not remain unfinished, for in his service he had a devoted librarian.  This man would travel on horseback all the way to Shiraz where the best master gilders lived; then he'd take a couple of pages to Isfahan seeking the most elegant calligraphers of Nestalik script; afterwards he'd cross great mountains till he'd made it all the way to Bukhara where he'd arrange the picture's composition and have the figures drawn by the great master painter who worked under the Uzbek Khan; next he'd go down to Herat to commission one of it's half-blind old masters to paint from memory the sinuous curves of plants and leaves; visiting another calligrapher in Herat, he'd direct him to inscribe, in gold Rika script, the sign above a door within the picture; finally, he'd be off again to the south, to Kain, where displaying the half-page he had finished during his six months of travelling, he'd receive the praises of Sultan Ibrahim Mirza.

At this pace, it was clear that the book would never be completed, so mounted Tartar couriers were hired.  In addition to the manuscript leaf, which was to receive the artwork and scripted text, each horseman was given a letter describing the desired work in question to the artist.  Thus, messengers carrying manuscript pages passed over the roads of Persia, Khorasan, the Uzbek territory and Transoxania.  At times, on a snowy night, page 59 and 162, for example, would cross paths in a caravansary wherein the howlings of wolves could be heard, and as they struck up a friendly conversation, they'd discover that they were working on the same book project and would try to determine between themselves where and in which fable the prospective pages, retrieved from their rooms for this purpose, actually belonged.