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100%
Monitoring network computers with the Icinga Nagios fork
30.11.2025
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© Alterfalter, 123RF.com
141.20.108.124 07 active_checks_enabled 1 08 passive_checks_enabled 0 09 max_check_attempts 3 10 check_command check-host-alive 11
91%
Using Expect scripts to automate tasks
31.10.2025
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© Kheng Ho Toh, 123RF.com
14 expect -exact "$ " 15 send -- "ssh aspen\r" 16 expect -exact "password: " 17 send -- "PASSWORD\r" 18 expect -exact "$ " 19 send -- "ps -ef|grep apache\r" 20 expect -exact "$ " 21 send -- "exit\r" 22
89%
Checking password complexity with John the Ripper
30.11.2025
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, 378501 c/s virtual 18 Long: 1063K c/s real, 1063K c/s virtual 19 20 Benchmarking: LM DES [64/64 BS]... DONE 21 Raw: 8214K c/s real, 8214K c/s virtual 22 23 Benchmarking: NT MD4 [Generic 1x]... DONE 24
88%
SSH Administration – Windows in a Unix World
30.11.2025
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Gino Santa Maria, 123RF.com
at the prompt or double-click the Cygwin icon, and type startwwin at the bash prompt. Two significant things happen when you invoke the startxwin command: An xterm and an X server (Cygwin/X Server:0.0) launch
88%
Monitor your nodes with collectl
30.11.2025
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© nobeastsofierce, 123RF.com
X4 920 CPU (quad core) 8GB of memory (DDR2-800) The operating system and boot drive are on an IBM DTLA-307020 (20GB drive at Ultra ATA/100) /home is on a Seagate ST1360827AS A 64GB Intel X
87%
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
86%
Storage system with OpenSolaris and Comstar
30.11.2025
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Aleksandr Fomenkov, 123RF.com
initial tests are quite reasonable: 1GB memory, a virtual CPU, about 20GB of disk space, and a bridged network adapter with an Internet connection will do for now. Sun xVM VirtualBox is a good choice
85%
Beyond monitoring: Mathematical load simulation in Perl
30.11.2025
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© kudryashka, 123RF.com
Model"; 11 $work = "ebiz-tx"; 12 $node1 = "WebServer"; 13 $node2 = "AppServer"; 14 $node3 = "DBMServer"; 15 $think = 0.0 * 1e-3; # as per test system 16 $dtime = 2.2 * 1e-3; # dummy service time 17 18
84%
Business continuity for small to medium-sized enterprises
30.11.2025
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© Andrea, Fotolia.com
. In the test scenario, I defined a backup schedule with the following settings: Schedule: weekly Daily full backup: Monday – Friday 20:00 Daily incremental backup: Monday – Friday 08:00--18:00, 30
82%
Tracing applications with OProfile and SystemTap
30.11.2025
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© boing, Photocase.com
: all cores 0x40: core: this core 0x30: prefetch: all inclusive 0x10: prefetch: Hardware prefetch only 0x00: prefetch: exclude hardware prefetch 0x08: (M)ESI: Modified 0x04: M

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