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100%
Using Expect scripts to automate tasks
31.10.2025
Home »  Archive  »  2012  »  Issue 12: NAS S...  » 
© Kheng Ho Toh, 123RF.com
12 # quickly" after prompts. If you find your new script hanging up at 13 # one spot, try adding a short sleep just before the previous send. 14 # Setting "force_conservative" to 1 (see below) makes ... 12
98%
Reading and understanding database execution plans
31.10.2025
Home »  Archive  »  2012  »  Issue 12: NAS S...  » 
© Gunnar Pippel, 123RF.com
"."EUR_VALUE">=10) 26 3 - access<+>6<+>( "S"."SALE_DATE">TRUNC(SYSDATE@!) 27 -INTERVAL'+00-06' YEAR(2) TO MONTH) 1  The explain plan for command only stores the execution plan in the PLAN_TABLE. 2  The DBMS ... 12
55%
Checking password complexity with John the Ripper
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
from compromised systems is John the Ripper (John). John is a free tool from Openwall [1]. System administrators should use John to perform internal password audits. It's a small (<1MB) and simple ... 6
54%
Beyond monitoring: Mathematical load simulation in Perl
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
© 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 ... 6
54%
Workshop: Container virtualization with LXC on Ubuntu 10.04
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
© 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 ... 6
54%
An IT nomad's daily diary
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
© Kateryna Pruchkovska, 123RF.com
is adding these entries to the Cobbler database. A typical example looks something like Listing 1. Listing 1 System Settings 01 # cobbler system add --name=foo --profile=ksprofile-devel-rhel6 ... 6
18%
A simple approach to the OCFS2 cluster filesystem
30.11.2025
Home »  Archive  »  2010  »  Issue 1: System...  » 
© Kheng Ho Toh, 123RF.com
_dlm] root 3467 7 0 20:07 ? 00:00:00 [o2net] root 3965 7 0 20:24 ? 00:00:00 [ocfs2_wq] root 7921 7 0 22:40 ? 00:00:00 [o2hb-BD5A574EC8] root 7935 7 ... The vanilla kernel includes two cluster filesystems: OCFS2 has been around since 2.6.16 and is thus senior to GFS2. Although OCFS2 is non-trivial under the hood, it is fairly simple to deploy.
17%
Monitoring network computers with the Icinga Nagios fork
30.11.2025
Home »  Archive  »  2010  »  Issue 1: System...  » 
© Alterfalter, 123RF.com
friday 00:00-24:00 10 saturday 00:00-24:00 11 } 12 13 define timeperiod{ 14 timeperiod_name wochentags 15 alias Robot Robot
15%
Monitor your nodes with collectl
30.11.2025
Home »  Archive  »  2012  »  Issue 09: Windo...  » 
© nobeastsofierce, 123RF.com
YZCD 03 # DaemonOpts: -f /var/log/collectl -r00:00,7 -m -F60 -s+YZCD --iosize 04 ################################################################################ 05 # Collectl: V3.6.1-4 HiRes: 1 Options
15%
Give your servers the once over with Nmap
31.10.2025
Home »  Archive  »  2012  »  Issue 11: Cloud...  » 
© 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

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