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18%
Data Analysis with R and Python
17.02.2015
Home »  Archive  »  2015  »  Issue 25: Safe...  » 
Lead Image © mopic, 123RF.com
rreport import reporter 04 import rpy2.robjects as ro 05 06 devs = importr('grDevices') 07 08 main = "3. Kepler's Law" 09 path = "tmp/Kepler3.png" 10 11 rep = reporter("galaxy", "comets", ["semaj
18%
Nagios alerts implemented via VoIP
14.03.2013
Home »  Archive  »  2013  »  Issue 13: IPv6...  » 
© Zentilia, 123RF.com
well. Of the available clients, PJSUA [3] turns out to be the best choice. PJSUA is the PJSIP reference implementation, and it comprises a function library for SIP, RTP, STUN, and some other Vo
18%
Monitoring daemons with shell tools
30.11.2025
Home »  Archive  »  2010  »  Issue 1: System...  » 
© Shariff Che'Lah, 123RF.com
#! /bin/sh 02 03 while true 04 do 05 06 zeit=$(date +%d.%m.%y\ %H:%M\ ) 07 08 psql -U monitor -d monitor -c "select * from watch;" 09 10 if [ $? -eq 2 ]; 11 12 then 13 14 echo "$time: Database
18%
HPCCM with Docker and Podman
09.09.2024
Home »  HPC  »  Articles  » 
in the list of Docker container images: $ docker images REPOSITORY          TAG       IMAGE ID       CREATED          SIZE ubuntu-24.04-dev1   latest    2358ab17d70c   13 minutes ago   149MB Note
18%
VMware Server 2.0 on recent Linux distributions
30.11.2025
Home »  Archive  »  2011  »  Issue 3: Are yo...  » 
Dmitry Tsvetkov, 123RF.com
06 yum downgrade perl\* 07 rpm -e man-db 08 rpm -e pam_ldap --nodeps 09 yum downgrade nss_ldap 10 ... Fortunately, Yum introduced a downgrade option in version 3.2.27 that makes it easier to step ... 3
18%
Virt-builder generates VM images in a flash
20.03.2014
Home »  Archive  »  2014  »  Issue 19: Perim...  » 
Lead Image © Petris, fotolia.com
for these systems; they normally reside in the builder/website/ directory [3]. To download, for example, an image for installing Fedora 19, change to the builder/website directory and issue the following command when
18%
Warewulf Cluster Manager – Development and Run Time
18.07.2012
Home »  HPC  »  Articles  » 
G   17G  66% /vnfs/usr/local This output shows that I had a 55.3MB VNFS image that expanded to use about 217MB. At the end of this article, the VNFS and installed image was 71.3MB that expanded ... Warewulf Cluster Manager – Part 3
18%
Sort out your SSH configs
07.10.2014
Home »  Archive  »  2014  »  Issue 23: 10 Ti...  » 
Lead Image © saniphoto, fotolia.com
and the other on all IPv6 IP addresses. Listing 1 Checking Open Ports chris@DebianBox:~# lsof -i :22 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME sshd 3328 root 3r IPv4 33323 0t0 TCP *:ssh
18%
Tracing applications with OProfile and SystemTap
30.11.2025
Home »  Archive  »  2010  »  Issue 1: System...  » 
© boing, Photocase.com
opcontrol --list-events oprofile: available events for CPU type "Core 2" See Intel Architecture Developer's Manual Volume 3B, Appendix A and Intel Architecture Optimization Reference Manual (730795-001) INST
18%
Guarding against social engineering attacks
01.08.2019
Home »  Archive  »  2019  »  Issue 52: Stop...  » 
Photo by Benjamin Sow on Unsplash
will be 2.2GB lighter. Figure 1: The download options with the SHA256 checksum to make sure it matches the reported checksum on the site. Be sure

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