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Beyond monitoring: Mathematical load simulation in Perl
30.11.2025
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© kudryashka, 123RF.com
Rate; 08 $ServerName = "Cashier"; 09 $Workload = "Customers"; 10 #------------ PDQ Model ------------ 11 # Initialize internal PDQ variable 12 pdq::Init("Grocery Store Checkout"); 13 # Modify the units used
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Haskell framework for the web
22.12.2017
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Photo by Aidas Ciziunas, Unsplash.com
Control.Applicative 11 import Yesod.Form 12 - set the web server port Warp to 3000 13 main :: IO () 14 main = warp 3000 FormApp 15 data FormApp = FormApp 16 instance Yesod FormApp 17 instance Render
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Interprocess communication essentials in Perl
05.12.2019
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Lead Image © Carsten Reisinger, 123RF.com
print WRITEHANDLE "Here is some text"; 11 close(WRITEHANDLE); 12 waitpid($processed, 0); 13 } else { 14 close(WRITEHANDLE); 15 while (defined($text = )) { 16 print $text; 17
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Hybrid public/private cloud
30.01.2020
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Photo by JJ Ying on Unsplash
region: eu-west-3 08 licensefile: license.lic 09 wholenet: 10.100.0.0/16 10 frontnet: 10.100.254.0/28 11 netmaskback: 17 12 backnet: "10.100.0.0/{{ netmaskback }}" 13 lnet: 10.0.2.0
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Finally: Java 9
13.02.2017
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Lead Image © Krockenmitte, photocase.com
= response.headers().map(); 10 for (String key : headers.keySet()) { 11 LOG.info(key + " : " + headers.get(key)); 12 } 13 14 String body = response.body(asString()); 15 LOG.info("body : " + body
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Build a honeypot with real-world alerts
01.08.2019
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Lead Image © Bruce Rolff, 123RF.com
. The takeaway is the -j LOG option (line 12), which logs port scanning behavior to a logfile with the iptables: prefix. Listing 1 iptable Rules 01 *filter 02 *filter 03 :INPUT ACCEPT [0:0] 04
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Look for file changes and kick off actions with Watchman
10.04.2015
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Lead Image © leksele, 123RF.com
for changed files from the command line). Listing 1 Configuration File 01 { 02 "version": "3.0.0", 03 "watched": [ 04 { 05 "path": "/opt/repos", 06 "triggers": [] 07 } 08
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Getting started with Prometheus
28.11.2021
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Photo by Clay LeConey on Unsplash
.53 node_cpu_seconds_total{cpu="0",mode="nice"} 187.19 node_cpu_seconds_total{cpu="0",mode="softirq"} 1029.12 node_cpu_seconds_total{cpu="0",mode="steal"} 0 node_cpu_seconds_total{cpu="0",mode="system"} 2991
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Setting up MariaDB replication with the help of XtraBackup
05.12.2016
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Lead Image © Kran Kanthawong, 123RF.com
Parallel_Mode: conservative 49 1 row in set (0.01 sec) If Slave_IO_Running and SLAVE_SQL_Running (lines 12 and 13) are set to Yes, then the slave is running. If one of the two parameters contains
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OCI containers with Podman
06.10.2019
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Photo by Ray Aucott on Unsplash
width: 35em; 10 margin: 0 auto; 11 font-family: Tahoma, Verdana, Arial, sans-serif; 12 } 13 14 15 16

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