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100%
Reading and understanding database execution plans
31.10.2025
Home »  Archive  »  2012  »  Issue 12: NAS S...  » 
© Gunnar Pippel, 123RF.com
(dbms_xplan.display );<+>2<+> 10 11 12 -----------------------------------------------------3------4---- 13 | Id | Operation | Name | Bytes | Cost | 14 ... 12
67%
Automating deployments on Proxmox with OpenTofu and cloud-init
04.12.2024
Home »  Articles  » 
Lead Image © lightwise, 123RF.com
Rubén Llorente ... " { 11 endpoint = "https://192.168.3.15:8006/" 12 username = "root@pam" 13 password = "proxmox" 14 insecure = true 15 tmp_dir = "/var/tmp" 16 17 ssh { 18 agent = true 19 } 20
67%
Automating command execution across servers
01.06.2024
Home »  Archive  »  2024  »  Issue 81: Load...  » 
Photo by Adrian Hartanto on Unsplash
Rubén Llorente ... : [devuan] 10 donkey: 11 user: root 12 host: donkey.operationalsecurity.es 13 tags: [devuan] 14 zebra: 15 user: root 16 host: zebra.operationalsecurity.es 17 tags: [devuan] 18 19
67%
An overview of the Citadel BBS
02.06.2020
Home »  Archive  »  2020  »  Issue 57: Artif...  » 
Lead Image © braverabbit; 123RF.com
Rubén Llorente ... , and a Sender Policy Framework (SPF) entry in the DNS record of your domain. Theoretically, it is possible to run an email service from a dynamic IP with dynamic DNS (Figure 12), but in practice it can
66%
Fast email server deployments with iRedMail
30.01.2024
Home »  Archive  »  2024  »  Issue 79: Monit...  » 
Lead Image © Konstantin Inozemtcev, 123RF.com
Rubén Llorente ... 8, 9 Debian 11, 12 Ubuntu 20.04, 22.04 FreeBSD 13.x OpenBSD 7.3 I recommend the downloadable installer, but I will skip
66%
Discover the power of RouterBOARDS
25.09.2023
Home »  Archive  »  2023  »  Issue 77: Secur...  » 
Lead Image © andreysuslov, 123RF.com
Rubén Llorente ... a blacklist from the EasyList [12] or StevenBlack [13] host file and loading it to the DNS server or the proxy server for your clients to use. Personally, I use a separate device for this task for performance
27%
News for Admins
05.08.2024
Home »  Archive  »  2024  »  Issue 82: Sover...  » 
 
race condition unless they are patched for CVE-2006-5051 and CVE-2008-4109." Read more at Qualys: https://blog.qualys.com/vulnerabilities-threat-research/2024/07/01/regresshion
26%
Performance Health Check
13.06.2022
Home »  HPC  »  Articles  » 
.69 17.26 67.7 IS (4 cores) 0.6 2.16 8.2 LU (6 cores) 5.13 41.8   MG (4 cores) 1.2 3.8 39.1 SP (4 cores
26%
Measuring the performance health of system nodes
02.08.2022
Home »  Archive  »  2022  »  Issue 70: Defen...  » 
Lead Image © Peter Hermes Furian, 123RF.com
.05 FT (4 cores) 1.69 17.26 67.7 IS (4 cores) 0.6 2.16 8.2 LU (6 cores) 5.13 41.8 MG (4 cores) 1.2 3.8 39
26%
GNU Parallel: Multicore at the Command Line with GNU Parallel
04.11.2011
Home »  HPC  »  Articles  » 
Recent trends in computing are toward more cores doing more tasks at once. These days, you are likely to have a dual- or quad-core CPU in your laptop, and perhaps 4, 6, 12, or 16 cores in your

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