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16%
Hardening mail servers, clients, and connections
03.04.2024
Home »  Archive  »  2024  »  Issue 80: Threa...  » 
Photo by jesse ramirez on Unsplash
use Ubuntu 22.04, but you can apply all the advice to other distributions, too. ClamAV is used in conjunction with SpamAssassin as a tool for filtering mail. Where action relating to name servers
16%
Creating an SFTP jail
30.11.2025
Home »  Archive  »  2011  »  Issue 3: Are yo...  » 
Juan Manuel Ordonez, 123RF.com
be replaced solely with the sshd configuration directives shown in Listing 3. Line 16 specifies that SFTP will listen on port 2202 instead of the default SSH port 22. This option is configurable and left ... 3
16%
Code IaC for provisioning of preconfigured virtual environments
26.01.2025
Home »  Archive  »  2025  »  Issue 85: Monit...  » 
Lead Image © vladnikon, 123RF.com
is an excellent Bicep-based reference and starting point that helps you get up and running quickly [3]. Table 1 BICEP Resource Definitions Resources Versioned w/@yyyy-mm-dd-state Common
16%
Tuning I/O Patterns in Fortran 90
04.12.2013
Home »  HPC  »  Articles  » 
today is Fortran 90, even though more current versions (Fortran 95, Fortran 2003, and even Fortran 2008) are available. I took the C code in the previous article (Listings 2C and 3C) and rewrote
16%
GUI or Text-Based Interface?
05.12.2018
Home »  HPC  »  Articles  » 
(Wikipedia, CC BY-SA 3.0). Another option is the Newt library, which focuses on color TUIs (Figure 2) and uses a widget approach, making programming a TUI much easier. With Newt, you can create stacked
16%
Tuning ZFS for Speed on Linux
17.03.2020
Home »  HPC  »  Articles  » 
       64 6836191232 sde    8       48 6836191232 sdd    8       80 6836191232 sdf Make sure to load the ZFS modules, $ sudo modprobe zfs and verify that they are loaded: $ lsmod|grep zfs zfs                  3039232  3
16%
Using a Bash script to mirror external monitors
10.06.2015
Home »  Archive  »  2015  »  Issue 27: Fault...  » 
Lead Image © bowie15, 123RF.com
(xrandr) "provides automatic discovery of modes (resolutions, refresh rates, …) [and] the ability to configure output dynamically (resize, rotate, move, …)" [3]. The xrandr configuration tool lets me
16%
Comparing startup times of Linux distros in the cloud
27.09.2021
Home »  Archive  »  2021  »  Issue 65: 7 Em...  » 
Lead Image © Lucy Baldwin, 123RF.com
Request timeout for icmp_seq 0 Request timeout for icmp_seq 1 Request timeout for icmp_seq 2 64 bytes from 52.90.56.122: icmp_seq=3 ttl=48 time=40.492 ms [ output truncated ] Welcome to Ubuntu 20.04.1 LTS
16%
Single sign-on like the big guys
20.06.2022
Home »  Archive  »  2022  »  Issue 69: Terra...  » 
Lead Image © Sergey Nivens, 123RF.com
_DB_PASSWORD=SOME_DB_PASSWORD 15 command: ["start-dev"] 16 17 postgres: 18 container_name: postgres 19 image: postgres:14 20 environment: 21 - POSTGRES_PASSWORD=SOME_DB_PASSWORD 22
16%
Selecting compilers for a supercomputer
18.02.2018
Home »  Archive  »  2018  »  Issue 43: Real...  » 
Lead Image Photo by Michal Kmet on Unsplash
code is written and compiled in one of three classic HPC languages: Fortran [2], C++ [3], or C [4]. Why these languages? Because they have enabled generation of very efficient code for a long time

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