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12%
Give your servers the once over with Nmap
31.10.2025
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© ragsac, 123RF.com
.nmap.org (64.13.134.52): Not shown: 994 filtered ports PORT STATE SERVICE VERSION 22/tcp open ssh OpenSSH 4.3 (protocol 2.0) 25/tcp closed smtp
11%
Web applications with Julia
26.01.2025
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Lead Image © sony sivanandan, 123RF.com
.0.0.1", PORT) do ws 08 for msg in ws 09 d = Meta.parse(JSON.parse(msg)["s"]) 10 @info d 11 @info typeof(d) 12 WebSockets.send(ws, """

You picked $d

11%
Managing computers with Rex
31.10.2025
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© Stanislav Rishnyak, 123RF.com
.168.2.14", "192.168.2.15"; 06 07 logging to_file => "rex.log"; 08 09 desc "Uptime estimate"; 10 task "uptime", group => ["intranet", "accounting"], sub { 11 say run 'uptime'; 12 }; Package Service Listing
11%
Securing email communication with GnuPG
07.10.2025
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Photo by Amol Tyagi on Unsplash_Key.jpg
output similar to ed25519 2022-08-29 [SC] [expires: 2027-08-20] uid [ultimate] Name name@example.org updgef8corpy81hia1rhd8npqiti6nzf @example.org In the output you will see a 32-character string
11%
Moving HPC to the cloud
31.10.2025
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© Zarko Cvijovic, 123RF.com
of options, including dual four-core Xeon, dual six-core Xeon, or quad 12-core AMD processors ranging in speed from 2.2 to 2.9GHz with 24 to 128GB of RAM per server and up to 1TB of scratch local storage per
11%
A Btrfs field test and workshop
31.10.2025
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© Adrian Hillman, 123RF.com
, followed by an installation guide using a virtual instance of Ubuntu 12.04 as an example. Then, I'll demonstrate the main administration tool. Following this, the root filesystem on a test system
11%
Building a custom Cyberdeck
07.10.2025
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Lead Image © Lucy Baldwin, 123RF.com
launched nary 20 years ago (Figure 1). Its underpowered early Atom CPU cannot support a modern graphical environment, but the intended use as a terminal in init 3 mode moots that concern entirely. Sadly, I
11%
News for Admins
07.10.2025
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-performance computing, known as quantum-centric supercomputing." "In a quantum-centric supercomputing architecture," the announcement states (https://newsroom.ibm.com/2025-08-26-ibm-and
10%
Linux small business servers compared
31.10.2025
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© Umzugskartons, fotolia.
. Unfortunately, version 2.2, available since September 2011, is no longer up to date as far as software packages are concerned, which in some cases could lead to weaknesses in security. Version 2.2 runs on top

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