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100%
Fast email server deployments with iRedMail
30.01.2024
Home »  Archive  »  2024  »  Issue 79: Monit...  » 
Lead Image © Konstantin Inozemtcev, 123RF.com
Rubén Llorente ... all the components you need for a small system (Figure 5; Table 2). Figure 3: The steps to installing iRedMail on Rocky Linux 9 by the downloadable
99%
An overview of the Citadel BBS
02.06.2020
Home »  Archive  »  2020  »  Issue 57: Artif...  » 
Lead Image © braverabbit; 123RF.com
Rubén Llorente ... shell (SSH). The primary function of BBSs, however, has not changed. The original Citadel was written in 1981 and has a convoluted story [2]. The implementation discussed in this article, technically
99%
Discover the power of RouterBOARDS
25.09.2023
Home »  Archive  »  2023  »  Issue 77: Secur...  » 
Lead Image © andreysuslov, 123RF.com
Rubén Llorente ... is nothing but Linux firmware designed for router duty. Its main drawback is that, unlike common Linux distributions, it is not redistributable because it comes with proprietary features [2]. Additionally
99%
Automating command execution across servers
01.06.2024
Home »  Archive  »  2024  »  Issue 81: Load...  » 
Photo by Adrian Hartanto on Unsplash
Rubén Llorente ... _host 02 known_hosts_file: /home/sake/.ssh/known_hosts2 03 04 # Every server is labeled with the "devuan" tag 05 servers: 06 horse: 07 user: root 08 host: horse.operationalsecurity.es 09 tags
99%
Hardware-enhanced security
03.02.2022
Home »  Archive  »  2022  »  Issue 67: syst...  » 
Lead Image © Jeff Metzger, 123RF.com
Rubén Llorente ... offers a whole range of models with different capabilities, with prices ranging from EUR29 to 109 (VAT not included; or about $25--$88). They also produce a line of Qubes OS-certified laptops and Nextcloud
99%
Automating deployments on Proxmox with OpenTofu and cloud-init
04.12.2024
Home »  Articles  » 
Lead Image © lightwise, 123RF.com
Rubén Llorente ... from a reputable source [9], because both OpenBSD's HTTP daemon and reverse proxy are extremely simple to set up. 2. Load your cloud-init configuration into your host provider, which should have
56%
Preload Trick
11.05.2021
Home »  HPC  »  Articles  » 
, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192]      A = single( rand(N,N) );    B = single( rand(N,N) );      start = clock();    C = A*B;    elapsedTime = etime(clock(), start);      gFlops = 2*N*N*N / (elapsedTime * 1e+9);      disp(sprintf("N = %4d
56%
Shell practice: Introduction to the sed stream editor
09.08.2015
Home »  Archive  »  2015  »  Issue 28: SSD RAID  » 
Lead Image © Dmitriy Sladkov, 123RF.com
. Figure 1: Sed syntax structure. To put multiple commands on one line use the -e option: sed -e 'command1' -e 'command2' ... -e 'commandN' .... Or, you can add these commands from a script file
56%
mpi4py – high-performance distributed Python
30.11.2020
Home »  Archive  »  2020  »  Issue 60: Secur...  » 
Lead Image © liu liming, 123RF.com
): 11 12 s = 0.0 13 s += h * f(a) 14 for i in range(1, n): 15 s += 2.0 * h * f(a + i*h) 16 # end for 17 s += h * f(b) 18 return (s/2.) 19 # end def 20 21 22 # Main section 23 comm = MPI
56%
mpi4py – High-Performance Distributed Python
12.11.2020
Home »  HPC  »  Articles  » 
 f(x):   return x*x # end def     def trapezoidal(a, b, n, h):     s = 0.0   s += h * f(a)   for i in range(1, n):     s += 2.0 * h * f(a + i*h)   # end for   s += h * f(b)   return (s/2.) # end def     # Main

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