Sync ReadOnly (syncro)

I have put together a small description of how to use my syncro script and uploaded the script including the config file to the web server. I have mentioned this script before (Ubuntu on Alix (aufs))

You can find the description and the download here:

Ubuntu on Alix (aufs)

I did some further work on getting Ubuntu on the Alix. I have tested the basic kernel on my second Alix board (2c3). It works so far without problems.
In addition I did some research how to improve the installation. First I thought I would like to have the root file system read only. This manly to reduce the write access to the flash disc. For this I would have to create a ram disc and map several directories to this ram disc since some directories need to be writable. After some research and looking at the Voyage Linux distribution I found an other solution. On the next version of Voyage Linux they will use aufs. I did some tests with aufs and I think this could be the solution I use. I took the script from Voyage Linux and did some small changes to the script for mapping some directories for writing to a memfs. The script used by Voyage Linux is quite nice it will sync back the changes at shutdown and this way no log information get lost on normal shutdown.
I will post the change script later, since I need to do some changes until I think it fits all my needs.

maemo’s scratchbox under Ubuntu Hardy Heron

Today I tried to install the maemo 4 sdk on my Ubuntu Hardy Heron. The first part installing the scratchbox worked with almost no problems. But the installation of the SDK it self did not work that easy. The first error I got was the following:

Inconsistency detected by rtld.c: 1192: dl_main: Assertion ‘(void *) ph->p_vaddr == _rtld_local._dl_sysinfo_dso’ failed!

Lucky me I found a solution from Michael R. Head. It is important to set both values. The first helped me to get into the scratchbox but without setting the mmap_min_addr I could not fully install the applications in the ARMEL target. After I set the second parameter it worked without any further problems.

Execute the following two lines that are described in the solution from Michael R. Head and the installation will work.

echo 0 | sudo tee /proc/sys/vm/vdso_enabled

echo 4096 | sudo tee /proc/sys/vm/mmap_min_addr