Linux

http://live.gnome.org/OCRFeeder software for automatic layout analysis and optical text recognition (GTK-based, possibly cross-platform)

http://diznix.com/dizwell/archives/153 Full Text Search benchmark, Oracle vs Postgres, on 2x Quad core Xeon, 8G RAM, 2 SSDs x RAID 1. Pg is being slightly faster when query contains several words, once word count increases, oracle leaps ahead (suggesting a more mature FTS implementation)

http://nfws.inl.fr/nfws_userday/Jesper-Brouer_Large-iptables-rulesets.pdf Netfilter: Making large iptables rulesets scale

http://nuclight.livejournal.com/125747.html A way to detect BT protocol traffic – instead of looking at every packet, traffic to torrent tracker websites is redirected (via divert(4) ) and then analyzed. Analyzer script (PERL) produces the src_ip, dst_ip, dst_port triplet, this info can be used to produce firewall rules

http://kbase.redhat.com/faq/docs/DOC-7715 CPU Identifications in linux kernels (2.6.18 + rhel patches) , NOTE that this is not applicable when you are running linux kernel on top of virtual hardware (i.e. Dom0 and DomU kernels won’t show proper CPU info because they use “virtual CPU” as set by XEN )

http://openvswitch.org/ right now ppl are using linux bridges as virtual switches for XEN/KVM VMs. Open vSwitch is an improvement over linux bridge that supports industry standard protocol and features and IOS-like CLI – [when project matures] ]you should be able trunk your VM server with cisco switch and expand it into the server with all features supported and backed by a standard config.

http://www.ibm.com/developerworks/views/linux/libraryview.jsp?site_id=1&contentarea_by=Linux&sort_by=Date&sort_order=1&start=1&end=3&topic_by=-1&product_by=&type_by=Articles&show_abstract=true&search_by=kernel%20apis, Series of short articles on linux kernel [2.6.27] APIs by Tim Jones

http://www.ibm.com/developerworks/linux/library/l-linuxboot/ [short] reference for linux boot process

http://dga.livejournal.com/44132.html a lot of interesting details about using flash drives as cache and high-perf block io devices (notes from google talk given at UCSD)

http://www.techradar.com/news/audio/linux-audio-explained-685419?artc_pg=1 Excellent article explaining linux audio stack, describing which component does what and why