# delete duplicate, consecutive lines from a file emulates “uniq”. # First line in a set of duplicate lines is kept, rest are deleted. sed ‘$!N; /^\.\\n\1$/!P; D’
via Removing duplicate lines with sed.
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Removing duplicate lines with sed
Posted March 15, 2012 By Landis VDatomic
Posted March 7, 2012 By Landis VInterestingly, the thought had recently crossed my mind about a git-like wiki or database structure in the past few days (I have been using git and make recently for router configuration project change management with great success… if time permits, I will write more on this at a later date), and a colleague shared this link with me.
Network Protocol Characteristic and Flaw Documentation
Posted March 7, 2012 By Landis VI should probably register and contribute here. I’m on a first name basis with quite a few protocols, but invariably I encounter something with which I’m not familiar, and the search is usually futile. The downside in this case is the assumption that you already know the protocol and are looking for additional information about it, rather than my typical use case where I see a port in use and capture some data about it, and am instead looking to see what protocol it is.
A corollary to this link might be http://www.emergingthreats.net, as it provides a purpose and in some cases perhaps descriptors of the traffic.
The more I think about it, search around, and reflect on past experience, the more of these types of sites come to mind. The documentation and descriptions we use for protocols and their inherent characteristics and flaws just doesn’t seem to have standardized in the same way that others have (i.e., CERT, MITRE).
Filed in Communications, Links
Cluster build environment
Posted March 5, 2012 By Landis VThis is quite an interesting build sheet linked from the screenshots at http://netkiller.sourceforge.net. Most of my design doesn’t get into this kind of depth – and in fact, stays almost exclusively at the layer 2/layer 3 level, below what’s generally reflected here. There’s just a zen-like aura surrounding this diagram, and as I reviewed it, a feeling of peace came over me. So, I thought I’d mark it in case I do need to design at this scope at some point in the future.
Network Tuning and Performance Guide @ Calomel.org – Open Source Research and Reference
Posted March 5, 2012 By Landis Vhttps://calomel.org/network_performance.html
Good article on throughput under BSD pf.
Building a sleeve hitch – Garden Tractor Talk
Posted March 2, 2012 By Landis Vhttp://gardentractortalk.com/forums/topic/7359-building-a-sleeve-hitch/
and linked page at http://members.shaw.ca/rock.farmer/attach.htm
Has guide/pictures for building a sleeve hitch.
Filed in Lawn & Garden
Fedora, Mint, openSUSE, Ubuntu: Which Linux desktop is for you? – PC Advisor
Posted March 2, 2012 By Landis VI think this is an article I read some time back and had been hunting for. The author’s review provided a perspective I find useful as I consider a switch from Ubuntu. I’ll be trying out Mint and am also hoping to test the latest alpha/beta of Ubuntu (while also running a test of Windows 8, hopefully). If I get my firewall relocated this weekend so I have space to plug another chassis into my KVM, I hope to be able to start on one or two of these.
