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Introduction to behavior-driven monitoring
30.11.2025
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Mariya Herasymenko, 123RF
/usr/lib64/ruby/1.8/logger.rb:487:in `initialize' 12 /usr/lib64/ruby/1.8/logger.rb:263:in `new' 13 /usr/lib64/ruby/1.8/logger.rb:263:in `initialize' 14 /usr/lib/nagios
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The RADOS object store and Ceph filesystem
30.11.2025
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© Brigida Soriano, Fotolia.com
/ceph/$name.keyring 04 [mon] 05 mon data = /srv/mon.$id 06 [mds] 07 [osd] 08 osd data = /srv/osd.$id 09 osd journal = /srv/osd.$id.journal 10 osd journal size = 1000 11 [mon.a] 12 host = alice 13 mon
12%
How Upstart boots Ubuntu-based systems
30.11.2025
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start on filesystem 05 exec /usr/bin/measd --log=/var/log/noise/measure.log 06 07 pre-start script 08 # Create required script: 09 mkdir -p /var/log/noise 10 end script 11 12 post-stop script 13 # Clean
12%
Intrusion detection with Prelude
30.11.2025
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© Chittima Kasa, 123RF.com
11 12 13 Order allow,deny 14 Allow from all 15 16 17 Alias /prewikka/ /usr/share/prewikka/htdocs/ 18 ScriptAlias / /usr/share/prewikka/cgi-bin/prewikka.cgi 19
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Moving HPC to the cloud
31.10.2025
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© Zarko Cvijovic, 123RF.com
, or spot purchase of resources. Generally, the cost for on-demand EC2 instances are as follows: Quadruple Extra Large Instance is US$ 1.3/hour (US$ 0.33/core per hour), Eight Extra Large Instance is US$ 2
12%
Script utilities in depth: grep, awk, and sed
30.11.2025
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© jirkaejc, 123RF.com
/share/zoneinfo -type f | \ 07 grep -v 'posix|right|Etc|SystemV | \ 08 grep -i $city` 09 echo -n "Time in $1: "; TZ=`echo $z` date The first section of this code ensures that the script's argument
12%
High-availability workshop: GFS with DRBD and Pacemaker
30.11.2025
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© Maxim Borovkov, 123RF.com
10 11 12 13 14 15 16
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Reading email in the browser with Horde
30.11.2025
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©Daniel Villeneuve, 123RF.com
, 09 'protocol' => 'imap', 10 'port' => 143, 11 // Plaintext logins are disabled by default on 12 // IMAP servers (see RFC 3501 [6.2.3]) 13 'secure' => 'tls', 14 'maildomain
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Protecting web servers with ModSecurity
30.11.2025
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© KrishnaKumar Sivaraman, 123RF.com
the SecDebugLogLevel parameter to specify verbosity, on a scale of 0 to 9, which issues comments on its own activities and the way it processes user-defined rules. Levels 4 or 5 are useful for fine tuning
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The next generation of Internet connectivity
30.11.2025
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ktsdesign, 123RF.com
radvd Configuration 01 interface eth1 02 { 03 AdvSendAdvert on; 04 MinRtrAdvInterval 30; 05 MaxRtrAdvInterval 100; 06 prefix 2001:42b5:d64a:0::/64 07 { 08 AdvOnLink on; 09

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