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30.11.2025

Home » Archive » 2012 » Issue 07: Xen v... »

.g., 192.168.0.0/24). # tcpdump net 192.168.1.1/24 Src, dst Only capture packets from a source or destination. # tcpdump src 192.168.100.234# tcpdump dst 10.10.24.56 host

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Programming with OpenMP

07.11.2011

Home » HPC » Articles »

. Figure 1: By default, top shows the total load for all CPUs … The program seems to be using 100 percent of the CPU. But appearances can be deceptive: The computer’s actual load is just 60 percent

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The Road to End-of-Scale

19.06.2013

Home » HPC » Articles »

..  Figure 1: CPU clock frequency over time (CC BY-SA 3.0 US). Of course, you know the reason: Higher clocks, and thus temperatures, were not sustainable. That is not to say clock rates will not increase

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Link Encryption with MACsec

28.11.2023

Home » Archive » 2023 » Issue 78: Domai... »

Lead Image © Oleksandr Omelchenko, 123RF.com

with an Ethertype of 0x88e5 on the provider's network. Because MACsec works on Layer 2, it must be individually enabled for each interface. Encryption Method MACsec uses AES-GCM as the encryption algorithm

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SPDY HTTP Protocol

08.06.2012

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, “Hypertext Transfer Protocol,” which was finally standardized as HTTP 1.0 in May 1996. Just three years later, HTTP 1.1 was standardized to reflect the increasing load on the web. The revised protocol reduced

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News for Admins

14.08.2017

Home » Archive » 2017 » Issue 40: Lean... »

has announced the OCI v1.0.0 run time and image specifications. OCI is a cross-industry initiative to standardize technologies around Linux containers. Essentially, OCI seems to achieve the same goals

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Analysis tour with Binary Ninja

05.02.2023

Home » Archive » 2023 » Issue 73: Datab... »

the following code admin.c: #include int main(int argc, char **argv) { printf("Hello World!"); return 0; } You can compile the source code with: gcc -O0 admin.c -o admin The -O0 entry switches off

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Practical SELinux

31.10.2025

Home » Archive » 2012 » Issue 11: Cloud... »

allow -R -M xguest_irc policy_module(xguest_irc,1.0.0) require { type xguest_t; } ## ##

a ## Allow xguest users to use IRC ##

## gen_tunable(xguest_use_irc, true) tunable

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Automating repetitive tasks

07.10.2025

Home » Archive » 2025 » Issue 89: Autom... »

desktop license provides access to process mining on desktops and 50MB of process mining data storage, which can be expanded to up to 100GB per tenant. Power Automate Premium also provides AI tools

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Why Good Applications Don’t Scale

13.10.2020

Home » HPC » Articles »

, a is the application speedup, n is the number of processors, and p is the “parallel fraction” of the application (i.e., the fraction of the application that is parallelizable), ranging from 0 to 1. Equations are nice

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