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23%
Security without firewalls
31.10.2025
Home »  Archive  »  2012  »  Issue 12: NAS S...  » 
© rukanoga, 123RF.com
and then explicitly allow certain users access. It's similar to the deny by default approach I touched on in another article [3]. To achieve this, the /etc/hosts.deny file would look like this: sshd: ALL To allow
23%
Graphite: Collect and Visualize Numeric Data
30.07.2014
Home »  HPC  »  Articles  » 
minutes (lines 22-24), which you can find in the web GUI under the system node. Dots in the name create folders in the hierarchy; to create a graph, you then just click on one of the values in the web app
23%
Server administration with Cockpit
29.09.2020
Home »  Archive  »  2020  »  Issue 59: Custo...  » 
Photo by Joshua J. Cotten on Unsplash
at the blog [3] reveals that new versions of Cockpit are released approximately every two weeks. In an article from 2015 [4], ADMIN looked into the topic of managing Linux servers with Cockpit; since then
23%
Trivy security scanner
04.04.2023
Home »  Archive  »  2023  »  Issue 74: The F...  » 
Lead Image © MPower, photocase.com
(NIST) National Vulnerability [2] or the Aqua Vulnerability [3] database. Figure 1: An image scan with Trivy generates a long list of vulnerabilities
23%
Exploring the filesystem that knows everything
14.03.2013
Home »  Archive  »  2013  »  Issue 13: IPv6...  » 
Lucy Baldwin, 123RF
details as well [3]. The files in the Linux /proc directory also have a pleasingly hackable penchant for being directly readable as plain text, as opposed to more binary-centric proc implementations
23%
Dispatches from the world of IT
30.11.2025
Home »  Archive  »  2011  »  Issue 5: Pen Te...  » 
of approximately $3M per MW of IT. In addition, IT systems that can tolerate higher temperatures can reduce the risk of IT failures during facility cooling outages." Red Hat and SAP Red Hat announced
23%
ESXi ransomware attacks
05.02.2023
Home »  Archive  »  2023  »  Issue 73: Datab...  » 
Photo by Afif Ramdhasuma on Unsplash
and criticized the payment of ransom across society [3]. Although many insurance companies will pay the ransom today, some providers have already explicitly ruled out payment. Of course, criminals are also
23%
Virt-builder generates VM images in a flash
20.03.2014
Home »  Archive  »  2014  »  Issue 19: Perim...  » 
Lead Image © Petris, fotolia.com
for these systems; they normally reside in the builder/website/ directory [3]. To download, for example, an image for installing Fedora 19, change to the builder/website directory and issue the following command when
23%
Docker and Podman environments on Windows and Mac machines
28.11.2021
Home »  Archive  »  2021  »  Issue 66: Inci...  » 
Lead Image © bowie15 , 123RF.com
.14, although you can still resort to Docker Machine [3] in this case, which creates a virtual Linux system on the local host that you can then use to access the Docker engine. The example in Figure 1 uses
23%
Aggregating information with Huginn
18.02.2018
Home »  Archive  »  2018  »  Issue 43: Real...  » 
Lead Image © it Ilka Burckhardt, Fotolia.com
. The required modifications are explained in the Huginn wiki [3]. The software is based on Ruby on Rails [4] and therefore requires an installed Ruby environment; in fact, it needs version 2.2 or 2.3

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