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Building a port scanner in Python
28.07.2025
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Lead Image © Leo Blanchette, 123RF.com
in range(start_port, end_port + 1): 18 thread = threading.Thread(target=scan_port, args=(host, port)) 19 thread.start() 20 21 if __name__ == "__main__": 22 if len(sys.argv) != 4: 23 print
17%
Find Entra ID vulnerabilities with AzureADRecon
07.10.2025
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Photo by Ricardo Gomez Angel on Unsplash
provides central management functions for user accounts, roles, and access authorizations; and (4) integrated security policies, with features such as conditional access to help enforce security policies
17%
Hadoop for Small-to-Medium-Sized Businesses
06.05.2014
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is a development of MapReduce version 2 (MRv2). YARN is based directly on HDFS and assumes the role of a distributed operating system for resource management for big data applications (Figure 4
17%
OpenACC – Porting Code
07.03.2019
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 < m; j++) {          ...       }       ...    } } Another technique for parallelizing loops using OpenACC to gain more parallelism (more performance), is to tell the compiler to collapse the two loops to create one giant loop (Table 4). The collapse (2
17%
More Best Practices for HPC Containers
19.02.2020
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) with the exec subcommand, or (4) with the shell subcommand. Probably the easiest way to run the container is as a native command (i.e., execute the container’s runscript): $ ./hello
17%
History and use of the mail utility
05.12.2014
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Lead Image © Vlad Kochelaevskiy, fotolia.com
: chris@linux.tld [->] Subject: Picture yourself, on a boat, on a river [->] User-Agent: Heirloom mailx 12.5 6/20/10 [->] MIME-Version: 1.0 [->] Content-Type: multipart/mixed; boundary="=_546791b1.cwvb6n4
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Kubernetes Auto Analyzer
05.10.2018
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. As well as Evidence sections (which helped create the report), a Kubernetes Authorization Options section, and a Vulnerability Evidence section (Figure 4), you will find many other useful entries
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Port Knocking
07.10.2014
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Lead Image © rasslava, 123RF.com
heavyweight champion of one-liners, will be useful here, so make sure it is installed on your system. The default config file (Listing 4) begins with UseSyslog, which implies that the file /var/log/syslog (or
17%
A Distributed SQL Database
03.08.2023
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Photo by Sonika Agarwal on Unsplash
the instructions on the official website [4]. Next, initialize the first node in your cluster on the first machine with the command cockroach start --insecure --advertise-addr= --join=
17%
Kafka: Scaling producers and consumers
25.03.2021
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Photo by Patrick Schneider on Unsplash
is running fine for 10 or 20 minutes, and then suddenly – BOOM! – it stops working. I've found that using the Java GC command-line options -server -XX:+UseParallelGC -XX:ParallelGCThreads=4 are more than

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