Markus' Blog - os_unix category

Amazon EC2 boot script to associate elastic ip

Wed, 20 Jul 2011 18:43:00 GMT

After installation of the AWS API tools you can associate an elastic ip address to the instance from the instance itself during boot process.

I've written an SysV RC script.

Kernel compiling

Sun, 03 Jul 2011 08:57:34 GMT

To build a customized kernel for natty you can follow the outdated wiki article at
https://help.ubuntu.com/community/Kernel/Compile
Use the information for Ubuntu Karmic Koala (9.10) and newer releases!
Follow these additional instructions to get it to work...

X11 recording with ffmpeg

Sun, 31 Oct 2010 16:58:00 GMT

ffmpeg -f x11grab -s wxga -r 25 -i :0.0 -sameq /tmp/out.mpg

Oneliner to handle file system limitations on file move

Sat, 30 Oct 2010 23:31:00 GMT

A simple oneliner to move files to a file size limited file system (e.g. 2Gb)...
destdir=/destinationdir/../.. ; for f in * ; do s=$(stat -c %s "$f") ; if [ $s -ge $((2*1000*1000*1000)) ] ; then 7z a -mx=0 -tzip -v2000m "$destdir"/"$f".zip "$f" ; else mv -v "$f" "$destdir"/"$f" ; fi ; done

Java 7 supports creating symbolic links

Tue, 06 Jul 2010 18:50:00 GMT

Just discovered at
http://openjdk.java.net/projects/nio/javadoc/java/nio/file/Path.html#...
that Java 7 might support the developer in creating symbolic links to files and directories.

Virtualbox USB in Ubuntu Lucid

Wed, 10 Mar 2010 22:37:00 GMT

Although Lucid has replaced HAL you'll still need it to use USB in Virtualbox.

Thanks for the memory

Thu, 11 Feb 2010 10:40:00 GMT

Summary: Running out of Java™ heap isn't the only cause of a java.lang.OutOfMemoryError. If native memory runs out, OutOfMemoryErrors that your normal debugging techniques won't be able to solve can occur. This article explains what native memory is, how the Java runtime uses it, what running out of it looks like, and how to debug a native OutOfMemoryError on AIX®.

http://www.ibm.com/developerworks/aix/library/j-nativememory-aix/index.html

Snoop USB data stream in Linux

Wed, 10 Feb 2010 16:03:00 GMT

Greg Kroah-Hartman provided some older article to use printk in the USB driver of the Linux kernel to output complete data: http://www.linuxjournal.com/article/7582?page=0,0