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100%
Storage system with OpenSolaris and Comstar
30.11.2025
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Aleksandr Fomenkov, 123RF.com
07 192.168.209.200:3260,1 iqn.1986-03.com.sun:02:8f4cd1fa-b81d-c42b-c008-a70649501262 08 # iscsiadm -m node 09 # /etc/init.d/open-iscsi restart 10 # fdisk -l 11 Disk /dev/sdb: 2147 MB, 2147418112 bytes
94%
Getting started with I/O profiling
30.11.2025
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© Photosani, Fotolia.com
fsync 21 21 21 21 21 22 26 31 lseekm 3,848 766 2,946 762 739 738 757 3
91%
ARP cache poisoning and packet sniffing
30.11.2025
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© elisanth, 123RF.com
Destination MAC address Listing 1 Nemesis arp Packets 01 $ while true 02 > do 03 > sudo nemesis arp -v -r -d eth0 -S 192.168.1.2 -D 192.168.1.133 -h 00:22:6E:71:04:BB -m 00:0C:29:B2:78:9
90%
Strategies for routing voice calls around a firewall
30.11.2025
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gnohz, 123RF.com
14 15 v=0 16 o=alice 53655765 2353687637 IN IP4 20.22.24.27 17 s=- 18 t=0 0 19 c=IN IP4 20.22.24.27 20 m=audio 20333 RTP/AVP 0 1 3 99 21 a=rtpmap:0 PCMvU/8000 The RTP port causes the next issue
89%
Beyond monitoring: Mathematical load simulation in Perl
30.11.2025
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© kudryashka, 123RF.com
# Header for user-specific report 19 printf("%2s\t%4s\t%4s\tD=%2d\n", "N", "Xdat", "Xpdq", MAXDUMMIES); 20 21 foreach $users (sort {$a <=> $b} @vusers) { 22 pdq::Init($model); 23 $pdq::streams = pdq
88%
Netcat – The admin's best friend
31.10.2025
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© Dmitry Rukhlenko, 123RF.com
seconds, for example: # nc -p 16000 -w 30 examplehost.tld 22 If firewalling is in place and you need to originate your connection from a specific IP address to open a port, then you can enter: # nc -s 1.2.3
88%
Creating KVM machines with BoxGrinder and VMBuilder
31.10.2025
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© yewkeo, 123RF.com
Service (Amazon S3) 19 - ami plugin for Amazon Simple Storage Service (Amazon S3) 20 - sftp plugin for SSH File Transfer Protocol 21 - ebs plugin for Elastic Block Storage 22 - local plugin
88%
Give your servers the once over with Nmap
31.10.2025
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© ragsac, 123RF.com
.nmap.org (64.13.134.52): Not shown: 994 filtered ports PORT STATE SERVICE VERSION 22/tcp open ssh OpenSSH 4.3 (protocol 2.0) 25/tcp closed smtp
88%
High availability clustering on a budget with KVM
30.11.2025
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Yulia Saponova, 123RF.com
: 09 bb:0f:e3:7f:3e:ab:c3:5d:32:78:85:04:a2:da:f1:61 root@host1 You need to distribute the public part, that is the /root/.ssh/id_rsa_cluster.pub file, to all nodes in the cluster. The Strict
88%
An IT nomad's diary
30.11.2025
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© Jasmin Merdan, 123RF.com
is all it takes to create your own application, just like for the domain (Listing 3). Listing 3 Creating the Application 01 # rhc-create-app -a spaceuploader -t perl-5.10 -l tscherf

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