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27%
Real-World HPC: Setting Up an HPC Cluster
04.11.2011
Home »  HPC  »  Articles  » 
on enterprise-grade rack hardware, there is no reason one cannot follow along at home with a few beige boxes and an 10Mb hub, as long as the servers are capable of booting from the network with PXE [6]. PXE
27%
Network monitoring with Icinga and Raspberry Pi
17.02.2015
Home »  Archive  »  2015  »  Issue 25: Safe...  » 
Lead Image © AndreaDanti, 123RF.com
The Raspberry Pi SBC packs some high-quality hardware at a very affordable price. It's compact and requires very little power, and for less than $100, you can build a feature-rich network monitor (see the "What
27%
Get the best out of your bandwidth with tc
30.11.2025
Home »  Archive  »  2012  »  Issue 10: Traff...  » 
© Russell Shively, 123RF.com
bandwidth measurements as follows: Kilobytes are written as k or kb. Megabytes are written as m or mb. However, I'm more comfortable using kilobits and megabits. These terms are notated
27%
pfSense firewall and router distribution
30.11.2025
Home »  Archive  »  2012  »  Issue 07: Xen v...  » 
© Sergey Mironov, 123RF.com
access point, a DNS server, and even a WLAN access point. Despite all this, the complete system weighs in at just 100MB, and to get started, you just need a USB stick and 128MB of RAM. If the built
27%
Logical Bombs for Fun and Benchmarking
06.10.2019
Home »  Archive  »  2019  »  Issue 53: Secur...  » 
Lead Image © Lucy Baldwin, 123RF.com
such invocation is essentially a pure processor workload that will maximally use up to one CPU core while taking up close to zero I/O or memory resources. The top [3] command displays a perfect 1.00 load average
27%
Enlarging the TCP initial window
06.10.2019
Home »  Archive  »  2019  »  Issue 53: Secur...  » 
Photo by Jani Brumat on Unsplash
to the server; then, TCP transmits fewer segments at the next attempt. If the bandwidth fluctuates or interruptions occur, the same mechanisms apply. Bad Trip If you want to transfer a 100KB file by HTTP/1
27%
A Btrfs field test and workshop
31.10.2025
Home »  Archive  »  2012  »  Issue 11: Cloud...  » 
© Adrian Hillman, 123RF.com
System, DUP: total=8.00MB, used=4.00KB Metadata, DUP: total=1.00GB, used=79.20MB If Btrfs only has one device available when the filesystem is created, it automatically generates a duplicate
27%
Green IT
24.10.2011
Home »  Articles  » 
 
) and about 6 million Euros (large corporation). The total period of the study was divided into segments of three years each, because this reflects both the typical warranty period and the typical write
27%
Ease your network inventory pain with Spiceworks
07.04.2016
Home »  Archive  »  2016  »  Issue 32: Measu...  » 
Lead Image © Paul Tobeck, fotolia.com
Inventory suite using open source software that includes SQLite, Ruby, and Apache. The spiceworks.exe application is a single, small (66MB) Windows executable file that installs and scans your network devices
26%
John the Ripper
22.08.2011
Home »  Articles  » 
 
systems is John the Ripper (John). John is a free tool from Openwall. System administrators should use John to perform internal password audits. It’s a small (<1MB) and simple-to-use password

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