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Network traffic utilities bandwhich and iftop

02.06.2020

Home » Archive » 2020 » Issue 57: Artif... »

, you need the Rust package manager Cargo. However, if you use the apt install cargo command, you'll see that it needs a not-so-trivial 328MB of disk storage for Cargo and its libraries – just to be able

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A TurnKey Linux software evaluation platform

10.04.2015

Home » Archive » 2015 » Issue 26: OpenS... »

, but the backup mechanism always uses encryption, and the Hub handles key management. Backups can be saved in the Amazon S3 cloud service and are always available for download via the GeoIP tag to the nearest data

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US Army Puts a Supercomputer in a Shipping Container

20.08.2019

Home » HPC » News »

in a shipping container. The $12 million IBM system will include an on-board uninterruptible power supply, chilled water cooling, and a fire suppression system. The system comes with 22 nodes for machine learning

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Search for domain controller vulnerabilities

28.07.2025

Home » Archive » 2025 » Issue 88: 5 Net... »

at the command line, type: nmap -sP 10.0.0.0/16 The -sP option (ping scan) discovers which IP addresses are currently active on the network. After a short wait, Nmap displays all active devices, including

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What is an IOPS Really?

24.02.2022

Home » HPC » Articles »

MB p s or Peak IOPS is x . However, what does “IOPS” really mean and how is it defined? Typically, an IOP is an I/O operation, wherein data is either read or written to the filesystem

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Beyond monitoring: Mathematical load simulation in Perl

30.11.2025

Home » Archive » 2011 » Issue 6: Perfor... »

Model"; 11 $work = "ebiz-tx"; 12 $node1 = "WebServer"; 13 $node2 = "AppServer"; 14 $node3 = "DBMServer"; 15 $think = 0.0 * 1e-3; # as per test system 16 $dtime = 2.2 * 1e-3; # dummy service time 17 18

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Build a honeypot with real-world alerts

01.08.2019

Home » Archive » 2019 » Issue 52: Stop... »

NEW -m tcp --dport 22 -j ACCEPT 10 -A INPUT -p udp --dport 5353 -j DROP 11 -A INPUT -s -p tcp -m state --state NEW -m tcp --dport 443 -j ACCEPT 12 -A INPUT -m limit --limit 30/min -j

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Samba 4 appliances by SerNet and Univention

16.05.2013

Home » Archive » 2013 » Issue 14: Samba 4 »

optionally provide file services with its own virtual file server, NTVFS (necessitating a filesystem with XATTR support) or the embedded Samba 3 file server, S3FS. Best practices suggest separating file

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Automated Azure Kubernetes Service cluster builds

01.06.2024

Home » Archive » 2024 » Issue 81: Load... »

Lead Image © Kittipong Jirasukhanont, 123RF.com

-nodepool1-39945963-vmss000000 Ready agent 14m v1.27.7 10.224.0.4 Ubuntu 22.04.3 LTS 5.15.0-1051-azure containerd://1.7.5-1 You can see an internal IP address, the version of the Ubuntu Linux node

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Application virtualization with Docker

08.10.2015

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

Applications are no longer only developed and run on local machines. In the cloud era, this also takes place in virtual cloud environments. Such platform as a service (PaaS) environments offer many