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  • Article (Print) (41)
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100%
Data acquisition with shell tools
30.11.2025
Home »  Archive  »  2010  »  Issue 2: Backup...  » 
Dmitriy Syechin, 123RF
|21|" | cut -d\| -f3` 48 b=`cat $newdat | grep "50|25|" | cut -d\| -f3` 49 50 a=$(echo $a | tr \, \.) 51 b=$(echo $b | tr \, \.) 52 53 54 psum=$(echo "$a+$b" | bc ) 55 echo -n "Invoice amount: $psum, continue
97%
Tracing applications with OProfile and SystemTap
30.11.2025
Home »  Archive  »  2010  »  Issue 1: System...  » 
© boing, Photocase.com
("------------------------------------------- ----------------------\n") 09 } 10 11 probe tcp.receive { 12 printf(" %15s %15s %5d %5d %d %d %d %d %d 13 %d\n", saddr, daddr, sport, dport, urg, 14 ack, psh, rst, syn, fin) 15
97%
Monitoring network computers with the Icinga Nagios fork
30.11.2025
Home »  Archive  »  2010  »  Issue 1: System...  » 
© Alterfalter, 123RF.com
, or disk space usage, you need to install a verbose add-on, such as NRPE [3], on each machine. The remote Icinga server will tell it to execute the plugins on the local machine and transmit the required
97%
Beyond monitoring: Mathematical load simulation in Perl
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
© kudryashka, 123RF.com
--------- ------ ---- ----- ---- 12 Throughput Cashier Customers 0.7500 Cust/Sec 13 Utilization Cashier Customers 75.0000 Percent 14 Queue Length Cashier Customers 3.0000 Cust 15 Residence Time Cashier Customers 4.0000 Sec 16 N Sws
96%
Workshop: Container virtualization with LXC on Ubuntu 10.04
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
© Tormod Rossavik, 123RF.com
and modifying the IP address in line 8. The line lxc-create -n guest -f /lxc/conf.guest Listing 3 Container Configuration: conf.guest 01 lxc.utsname = guest 02 lxc.tty = 4 03 lxc
96%
A simple approach to the OCFS2 cluster filesystem
30.11.2025
Home »  Archive  »  2010  »  Issue 1: System...  » 
© Kheng Ho Toh, 123RF.com
, Fedora, and openSUSE systems. Depending on the kernel version, users either get version 1.4, which was released in 2008, or version 1.2, which is two years older. The "OCFS2 Choices" box and Table 3 show
94%
Archiving email and documents for small businesses
30.11.2025
Home »  Archive  »  2012  »  Issue 08: FreeNAS  » 
© Pavlenko Evgenly, fotolia.com
. The search.sh script (Listing 3) shows a minimalist query function. The call to namazu points to the configuration file (-f). The output is limited to 500 matches (-n) and is returned in HTML format (-h). See
94%
Script utilities in depth: grep, awk, and sed
30.11.2025
Home »  Archive  »  2011  »  Issue 4: Secure...  » 
© 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
94%
Intruder detection with tcpdump
30.11.2025
Home »  Archive  »  2012  »  Issue 07: Xen v...  » 
© Monika Wisniewska, 123RF.com
: Figure 4: Header bytes 12-15. # tcpdump -n -r dumpfile.lpc -c 10 'tcp[13] == 18' and host 172.16.183.2 Figure 5 is an example what this command returns. When capturing data with tcpdump, you can
94%
VMware Server 2.0 on recent Linux distributions
30.11.2025
Home »  Archive  »  2011  »  Issue 3: Are yo...  » 
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 ... 3

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