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26%
High-availability workshop: GFS with DRBD and Pacemaker
30.11.2025
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© Maxim Borovkov, 123RF.com
Resource 01 primitive p_filesystem ocf:heartbeat:Filesystem params 02 device="/dev/drbd/by-res/disk0/0" directory="/opt" fstype="gfs2" 03 op monitor interval="120s" meta target-role="Started" 04 clone cl
26%
Managing virtual machines
30.11.2025
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© Igor Klimov, 123RF.com
end (Figure 2). Listing 3 update-dns 01 #!/usr/bin/perl 02 03 use DBI; 04 05 $db_user = "powerdns"; 06 $db_passwd = "powerpass"; 07 08 $hostname = $ARGV[0] . ".my.org"; 09 $ip = $ARGV[1
26%
Data acquisition with shell tools
30.11.2025
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Dmitriy Syechin, 123RF
the database connection (Listing 2). Listing 2 Database Connection 01 #! /bin/sh 02 echo "Demo for database write access" 03 rm input.sql 04 touch input.sql 05 sleep 3 06 clear 07 08 # Entry 09 10
25%
Script utilities in depth: grep, awk, and sed
30.11.2025
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© jirkaejc, 123RF.com
in a specified city. Listing 1 Display Date and Time 01 if [ "$1" = "" ]; then 02 echo "City name required." 03 exit 04 fi 05 city=`echo $1 | sed -e 's/ /_/g'` 06 z=`find /usr
25%
Julia: A new language for technical computing
30.11.2025
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.84 132.71 3,127.50 713.77 4.11 mandel 5.55 31.15 65.44 824.68 156.68 5.67 pi_sum 0.74 18.03 1.08 328
25%
Sys Admin On the Go
30.11.2025
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Laurent Davoust, 123RF.com
friday 18:00-24:00 05 saturday 00:00-24:00 06 sunday 00:00-24:00 07 monday 00:00-09:00 08 } Hobbit To set up email alerts with Hobbit, edit /etc
25%
Workshop: Container virtualization with LXC on Ubuntu 10.04
30.11.2025
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© Tormod Rossavik, 123RF.com
.network.type = veth 04 lxc.network.flags = up 05 lxc.network.link = br0 06 lxc.network.hwaddr = 08:00:12:34:56:78 07 #lxc.network.ipv4 = 0.0.0.0 08 lxc.network.ipv4 = 192.168.1.69 09 lxc.network.name = eth0 10 lxc
25%
Virus scanner and content filter with AD authentication
30.11.2025
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Denis Makarov, 123RF.com
-fA-F])/pack("c",hex($1))/eg; 04 # # test for each group squid sent in its request 05 # foreach $group (@groups) { 06 # group =~ s/%([0-9a-fA-F][0-9a-fA-F])/pack("c",hex($1))/eg; 07 08 # After modification: 09 10 $user
25%
Connecting dissimilar IPsec implementations
30.11.2025
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© Yuri Arcurs, 123RF.com
_shared_key "/etc/racoon/psk.txt"; 02 remote 192.168.1.31 { 03 exchange_mode main; 04 proposal { 05 encryption_algorithm 3des; 06 hash_algorithm sha1; 07 authentication_algorithm pre_shared_key; 08
25%
Moving HPC to the cloud
31.10.2025
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© Zarko Cvijovic, 123RF.com
will provide sub-par performance. A deeper treatment of these issues can be found in a recent article called "Will HPC Work in the Cloud?" [3]. Finally, any remote computation scheme needs to address

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