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13.06.2022

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be turned on and off according to what you want to check about the state of the node. Almost 20 years ago, when I worked for a Linux high-performance computing (HPC) company that no longer exists, We had

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Many Clouds, One API

22.08.2011

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, including separate servers for different regions of the same cloud, the Deltacloud server makes it possible to switch drivers on the go – either by including the HTTP headers X-Deltacloud-Driver and X

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A Brief History of Supercomputers

21.01.2021

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1992 i486DX2 2:1 clock multiplier, 40/20, 50/25, 66/33 speeds; L2 on MB Mar 1994 i486DX4 3:1 clock multiplier, 75/25, 100/33 speeds; 16KB L1 cache on-die, L2

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Safeguard and scale containers

05.12.2016

Home » Archive » 2016 » Issue 36: Autom... »

Since the release of Docker [1] three years ago, containers have not only been a perennial favorite in the Linux universe, but native ports for Windows and OS X also garner great interest. Where

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The practical benefits of network namespaces

15.08.2016

Home » Archive » 2016 » Issue 34: Softw... »

: Asymmetrical routing can be relatively easily avoided with namespaces. In practice, virtual veth<x> network devices are fairly typical for network namespaces. Whereas a physical device can only exist

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URL Tricks with htaccess

02.02.2012

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for this example: Order Deny,Allow Deny from All Allow from 12.12.12.12 Allow from 23.23.23.23 Allow from 34.34.34.34 This example denies access to everybody except the IPs listed, which follows the very sensible

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Mailman 3.0 – a long time coming

08.10.2015

Home » Archive » 2015 » Issue 29: Rescu... »

is a professional software tool, and the fan base appreciates its solid operating principles. Version 1.0 was released in mid-1999 [1], followed by 2.0 in 2000. The latest stable branch 2.1 appeared about 12 years ... Mailman 3.0 is a new major version, released 15 years after version 2.0. We put the new version through its paces and explain the installation procedure and new features.

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Operating systems for the cloud and containers

14.08.2017

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

[...] 10 ln -nfs _build/main.native mir-console 11 $ 12 $ file _build/main.native 13 _build/main.native: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU

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Automate CentOS and RHEL installation with PXE

02.02.2021

Home » Archive » 2021 » Issue 61: Secur... »

--nameserver=10.42.0.10,10.42.0.11 12 # Root password 13 rootpw --iscrypted 14 # Run the Setup Agent on first boot 15 firstboot --enable 16 # Do not configure the X Window System 17 skipx 18 # System

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Fundamentals of I/O benchmarking

11.04.2016

Home » Archive » 2016 » Issue 32: Measu... »

Example # iostat -xmt 1 /dev/sda Linux 3.16.7-21-desktop (tweedleburg) 08/07/15 _x86_64_ (8 CPU) 08/07/15 17:25:13 avg-cpu: %user %nice %system %iowait %steal %idle 1

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