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July 20 2011
May 26 2011
February 24 2011
December 22 2010
December 09 2010
December 02 2010
Reference Cards
reference cards provide a useful summary of certain scripting concepts. The foregoing text treats these matters in more depth, as well as giving usage examples.October 28 2010
ZFS Cheatsheet · Col's Tech
The three primary goals of ZFS are:1. Highly scalable (128-bit) data repository
2. Ease of administration
3. Guaranteed on disk data integrity
September 20 2010
August 16 2010
July 26 2010
June 11 2010
Git Reference
This is the Git reference site. This is meant to be a quick reference for learning and remembering the most important and commonly used Git commands. The commands are organized into sections of the type of operation you may be trying to do, and will preset the common options and commands needed to accomplish these common tasks.Each section will link to the next section, so it can be used as a tutorial. Every page will also link to more in-depth Git documentation such as the offical manual pages and relevant sections in the Pro Git book, so you can learn more about any of the commands. First, we'll start with thinking about source code management like Git does.
April 14 2010
March 15 2010
Visual Guide to NoSQL Systems - Nathan Hurst's Blog
There are so many NoSQL systems these days that it's hard to get a quick overview of the major trade-offs involved when evaluating relational and non-relational systems in non-single-server environments. I've developed this visual primer with quite a lot of help (see credits at the end), and it's still a work in progress, so let me know if you see anything misplaced or missing, and I'll fix it.November 09 2009
October 11 2009
Lava's IPv6 VLSM / CIDR Reference Chart
# Useable addresses: Network size minus two for Network & Broadcast and: # IPv6 uses 8 sets of 4 hex values, 16 bits each (128bit total) # /48 ISP "site assignments" have 65k possible subnets: bourne$ for a in {1..65536}; do printf "%04X\n" $a; done # Withing a /48, any combination of /49 ---> /64 are valid supernets (departmental, facility, function, other organizational model): $ ipv6gen 2001:0DC6:FF2B::/48 63|more # ...normally three or four more hosts are used for: 1) Switch VLAN1 2) Router Interface or 3) Two HSRP interfaces at .253 & .254 # "Route Summarization" = "Route Aggregation" = "Supernetting" # "terminal ip netmask-format [bitcount|decimal|hex]" on Cisco IOS to show netmasks as Dotted Decimal v.s. Hex # Print this document and keep on wall in cubical at all times. Memorize for fun. Quiz your spouse, offspring, inlaws, etc. # #include <std/disclaimer.h> in the event that a typo within snowballs your entire corporate networkSeptember 28 2009
Kurztipp: selbstsigniertes OpenSSL-Zertifikat mit einem Befehl :: WE ARE ROOT
openssl req -new -newkey rsa:1024 -days 365 -nodes -x509 -keyout www.example.com.pem -out www.example.com.pemAugust 05 2009
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