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Debugging the Linux kernel with the Qemu emulator
30.11.2025
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© Daniela Mangiuca, 123RF.com
_copied=copy_to_user(user,hello_world,to_copy); 19 return to_copy-not_copied; 20 } 21 22 static struct file_operations fops = { 23 .owner= THIS_MODULE, 24 .read= driver_read, 25 }; 26 27 static int __init mod_init( void ) 28 { 29
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Building a port scanner in Python
28.07.2025
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Lead Image © Leo Blanchette, 123RF.com
in range(start_port, end_port + 1): 18 thread = threading.Thread(target=scan_port, args=(host, port)) 19 thread.start() 20 21 if __name__ == "__main__": 22 if len(sys.argv) != 4: 23 print
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pfSense firewall and router distribution
30.11.2025
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© Sergey Mironov, 123RF.com
, and the books available in the stores right now, are mainly based on the older 1.2.x versions. Much of the content is still applicable, and if you are fairly familiar with the services, you will quickly find your
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The Swiss Army knife of fault management
30.11.2025
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© Dmitry Rukhlenko, 123RF.com
, to monitoring and controlling complete systems. Identifying Services OpenNMS can automatically identify the services you need to monitor. In versions up to 1.8.x, this task is handled by the capabilities daemon
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Single sign-on with SSSD, LDAP, and Kerberos
30.11.2025
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Anja Kaiser; Fotolia
: tscherf@TUXGEEK.DE 15 SASL SSF: 56 16 SASL data security layer installed. 17 dn: uid=TScherf,ou=People,dc=tuxgeek, dc=de 18 givenName: Thorsten 19 sn: Scherf 20 loginShell: /bin/bash 21 uidNumber: 9999 22
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Expand your sphere with a piece of Google
30.11.2025
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© artida, 123RF.com
="**/*.jar" /> 20 21 22 23 24 25
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Julia: A new language for technical computing
30.11.2025
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.33 164.69 0.75 rand_mat_stat 3.37 39.34 11.64 54.54 22.07 8.12 rand_mat_mul 1.00 1.18 0.70 1.65 8
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High-availability workshop: GFS with DRBD and Pacemaker
30.11.2025
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© Maxim Borovkov, 123RF.com
17 18 19 20 21 22 23 This example also
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Ceph Dashboard at a Glance
02.06.2026
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Lead Image © Prin Pattawaro, 123RF.com
], ceph health detail [11], and ceph osd tree [12] to piece together the big picture. As an added bonus, the Dashboard simplifies access to Ceph and RADOS for users and operators who do not work
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Network analysis with Wireshark
30.11.2025
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© Reinhard Eisele
runs with root privileges. The exceptions are Mac OS X and Solaris, where the user only needs access privileges for the network interface card device file. By default, Tcpdump reads all the data

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