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Pandas: Data analysis with Python
20.03.2014
Home »  Archive  »  2014  »  Issue 19: Perim...  » 
Lead Image © yang chao, 123RF.com
by convention – but not necessarily – is imported using: import numpy as np Multidimensional matrices are created in a similar way, that is, with nested lists: np.array([[1, 2, 3], [4, 5, 6]]) If the content
10%
An overview of VMware tools
12.09.2013
Home »  Archive  »  2013  »  Issue 16: Docker  » 
Lead Image © Giuseppe Ramos, 123RF.com
, is a multiclient-capable computing resource allocation model with specific customer allocation. For this product, you will be billed from 4.5 cents per hour on a monthly basis for a fully protected, fully redundant
10%
Apache 2.4 with mod_lua
30.11.2025
Home »  Archive  »  2012  »  Issue 09: Windo...  » 
© Tom Grundy, 123RF.com
The Lua scripting language was developed in 1993 at the University of Rio de Janeiro and was placed under the MIT license as of version 5 [1]. The interpreter, which weighs in at just a few
10%
Targeted defense against brute force attacks
30.11.2025
Home »  Archive  »  2011  »  Issue 3: Are yo...  » 
Andrii IURLOV, 123RF.com
client requests (1) in the auth.log file (2). Then sshguard (3) monitors the file and creates a firewall rule (4) that blocks the client (5) if it notices to many login attempts. If the attacker
10%
Symbolic mathematics with Python's SymPy library
13.12.2018
Home »  Archive  »  2018  »  Issue 48: Secur...  » 
Lead Image © Buchachon Petthanya, 123RF.com
to explore heat conduction calculations. All the examples presented here use the Spyder 3.2.8 Python development environment (Anaconda 5.2.0) on Mint 19.0 Xfce. Because the full code is too long for a printed
10%
Visualizing time series data
21.08.2014
Home »  Archive  »  2014  »  Issue 22: OpenS...  » 
Lead Image © Maxim Kazmin, 123RF.com
. Of course, you can also install Graphite from the Git sources [5]. In this case, however, you must consider that not all versions of the needed libraries will work well together, whereas the package
10%
Building a HPC cluster with Warewulf 4
04.04.2023
Home »  Archive  »  2023  »  Issue 74: The F...  » 
Photo by Andrew Ly on Unsplash
at this point. The time zone matches the head node, and the node is time syncing. Another thing to look at is the ntpstat output: $ ntpstat synchronised to NTP server (10.0.0.1) at stratum 5 time correct
10%
Network performance in the world's favorite data center
05.02.2023
Home »  Archive  »  2023  »  Issue 73: Datab...  » 
Lead Image © Lucy Baldwin, 123RF.com
--instance-type m6in.2xlarge --count 2 --output text Table 1 Network Performance Factors* Enhanced networking [4]   SR-IOV [5] and better hardware Elastic network adapter
10%
ASCII-based monitoring tools
30.05.2021
Home »  Archive  »  2021  »  Issue 63: Autom...  » 
Lead Image © tele52, 123RF.com
(-00:05:34), or 5 minutes, 34 seconds in the past. The advantage of scrolling back in time is the ability to save system performance data. By default, Zenith records data at two-second intervals. I have
10%
New features in MariaDB 10.3
05.02.2019
Home »  Archive  »  2019  »  Issue 49: Anato...  » 
Lead Image by Adarsh Kummur on Unsplash
and installs mariadb-server instead. Debian ships with MariaDB 10.1, and only Ubuntu still uses an original MySQL 5.7. If you don't believe me, try this test: SQL> SHOW GLOBAL VARIABLES WHERE Variable

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