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18%
Parallel Shells: Run Commands on Multiple Nodes
02.07.2014
Home »  HPC  »  Articles  » 
: [laytonjb@home4 ~]$ pdsh -w 192.168.1.250 uname -r 192.168.1.250: 2.6.32-431.11.2.el6.x86_64 The -w option means I am specifying the node(s) that will run the command. In this case, I specified the IP
18%
Nagios on a Rasp Pi 3 with NEMS
09.10.2017
Home »  Archive  »  2017  »  Issue 41: Kuber...  » 
Lead Image © Chris Gendreau; Fotolia
applications available by selecting Reporting : Nagios Core [5], NagVis [6], and Check_MK [7]. Each provides a different view of the Nagios3 monitoring data. Nagios Core is an event scheduler, event processor ... Nagios on a Rasp Pi 3 with NEMS
18%
Processing streaming events with Apache Kafka
02.02.2021
Home »  Archive  »  2021  »  Issue 61: Secur...  » 
Photo by Mark Decile on Unsplash
Connect [3], the Confluent Schema Registry [4], Kafka Streams [5], and ksqlDB [6] are examples of this kind of infrastructure code. Here, I look at each of these examples in turn. Data Integration
18%
MySQL is gearing up with its own high-availability Group Replication solution
17.06.2017
Home »  Archive  »  2017  »  Issue 39: Conta...  » 
Lead Image © lassedesignen, 123RF.com
One important reason for the success of MySQL [1] is asynchronous replication, introduced in the 2001 release 3.23, which allows admins to set up replica instances (slaves) that receive all data
18%
Understanding Layer 2 switch port security
22.12.2017
Home »  Archive  »  2017  »  Issue 42: Secur...  » 
Lead Image © Taffi, Fotolia.com
:1071867223(0) win 512 98:15:eb:38:f3:c1 c8:d7:c1:61:be:a3 0.0.0.0.30693 > 0.0.0.0.57646: S 1759104040:1759104040(0) win 512 dc:6d:43:15:be:52 99:19:41:22:4e:36 0.0.0.0.29211 > 0.0.0.0.63665: S 481173385
18%
News for Admins
01.06.2024
Home »  Archive  »  2024  »  Issue 81: Load...  » 
 
is, the fewer vulnerabilities it is likely to have. According to the report, container images smaller than 100MB had 4.4 high or critical vulnerabilities, versus 42.2 for images between 250 and 500MB ... and Management Software; LPI Launches Open Source Essentials Program; Apache Software Foundation Celebrates 25 Years; SUSE Announces Rancher Prime 3.0; NSA Issues Zero Trust Guidelines for Network Security
18%
Keep an eye on your network
01.08.2019
Home »  Archive  »  2019  »  Issue 52: Stop...  » 
Lead Image © damedeeso, 123RF.com
://pkg.osquery.io/rpm/GPG | sudo tee /etc/pki/rpm-gpg/RPM-GPG-KEY-osquery Now add and enable the repository with: $ sudo yum-config-manager --add-repo https://pkg.osquery.io/rpm/osquery-s3-rpm.repo $ sudo yum
18%
Efficient password management in distributed teams
18.02.2018
Home »  Archive  »  2018  »  Issue 43: Real...  » 
Lead Image © Sergey Nivens, 123RF.com
in source code, such as: var PASSWORD = 'sn4k3oil' This method tackles the challenge of keeping secret information synchronized between all team members in a simple, although not secure, way. On the one
18%
Visualizing log and other data
14.11.2013
Home »  Archive  »  2013  »  Issue 17: Cloud...  » 
Lead Image © Gennadiy Poznyakov, 123RF.com
it as an "experiment in organic software visualization" [3]. Similarly to Gource, code_swarm animates project changes in a version control system. Files appear as dots; their colors again indicate the file type (Figure
18%
Linux nftables packet filter
30.01.2020
Home »  Archive  »  2020  »  Issue 55: AWS L...  » 
Lead Image © alphaspirit, 123RF.com
The Linux kernel already contains a variety of packet filters, starting with ipfwadm and followed by ipchains and iptables. Kernel 3.13 saw the introduction of nftables [1], which uses the nft tool

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