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100%
Security without firewalls
31.10.2025
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© rukanoga, 123RF.com
's usually TCP port 22) to port 2222, for example, to keep port scans from filling up your logs. Without TCP Wrappers enabled, scans might run dictionary attacks on your server where password combinations ... 12
18%
Give your servers the once over with Nmap
31.10.2025
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© ragsac, 123RF.com
.34.56.78 -oN filename If you want screeds of detail, then it's also simple just to add the verbosity switch (twice for even more detail): # nmap -vv -sS 12.34.56.78 To truly avoid detection (in conjunction
16%
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 $pdq::streams = pdq
16%
Workshop: Container virtualization with LXC on Ubuntu 10.04
30.11.2025
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© Tormod Rossavik, 123RF.com
you additionally need in /cgroup. The following command is all the root user needs to run a single command – such as a shell – in an application container: lxc-execute -n foo -f /usr
16%
Data acquisition with shell tools
30.11.2025
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Dmitriy Syechin, 123RF
"------------------------------------------------------" 18 echo -n "Replace stored data line (y)? ";read we 19 if [ "$we" = "y" ]; 20 then 21 22 # Delete line and write to 23 # temporary file 24 25 # Build sed instruction 26
15%
Storage system with OpenSolaris and Comstar
30.11.2025
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Aleksandr Fomenkov, 123RF.com
-b81d-c42b-c008-a70649501262 05 # stmfadm add-view -h myiscsiclient -t myiscsiserver -n 1 600144f05f71070000004bc999020002 # cat /etc/iscsi/initiatorname.iscsi InitiatorName=iqn.1993-08.org
15%
Managing virtual machines
30.11.2025
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© Igor Klimov, 123RF.com
filesystem, if so desired [5]: $ guestfish -N fs:ext3 When you call Guestfish with the new image, $ guestfish -a you are taken to a shell where you first need to enter run to toggle the system ... 9
15%
VMware Server 2.0 on recent Linux distributions
30.11.2025
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Dmitry Tsvetkov, 123RF.com
.894212] vmware-hostd[3870]: segfault at 2100001c4f ip 0000003c0cb32ad0 sp 00007f3889e9cb88 error 4 in libc-2.12.90.so[3c0ca00000+19a000] Analysis and Plan A Initial analysis proved that the VMware
15%
Monitoring your cluster with a home-grown OCF agent
30.11.2025
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© Aleksey Mnogosmyslov, 123RF.com
07 if [ -n "$OCF_RESKEY_monitor_sipuri" ]; then 08 check_binary sipsak 09 fi 10 11 if [ ! -f $OCF_RESKEY_config ]; then 12 ocf_log err "Config $OCF_RESKEY_config doesn
15%
Tracing applications with OProfile and SystemTap
30.11.2025
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© boing, Photocase.com
686 oprofile-0.9.5-4.fc12.i686 To profile the kernel, you need to tell OProfile where the kernel image is located with the --vmlinux option: opcontrol --setup --vmlinux=/usr/lib/debug/lib/ modules

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