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74%
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
74%
Cgroups for resource management in Linux
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
© Photographer, 123RF.com
/memory; 06 devices = /cgroup/devices; 07 freezer = /cgroup/freezer; 08 net_cls = /cgroup/net_cls; 09 ns = /cgroup/ns; 10 blkio = /cgroup/blkio; 11
74%
Professional backup solutions compared
30.11.2025
Home »  Archive  »  2010  »  Issue 2: Backup...  » 
Kamil Macniak, 123RF
As of kernel 2.4.x As of kernel 2.2.x Asianux/Red Flag, CentOS, Debian, Novell OES, Red Hat, SUSE, Ubuntu BSD – FreeBSD, NetBSD, OpenBSD No No Free
74%
Installing your own Git server
30.11.2025
Home »  Archive  »  2012  »  Issue 08: FreeNAS  » 
© Guido Vrol, 123RF.com
="/usr/local/bin/gl-auth-command ofrommel",no-port-forwarding,no-X11-forwarding,no-agent-forwarding,no-pty ssh-dss AAAAB3NzaC1kc3MAAACBAOvwG6F0D2v2J8d+RsQFwozOqqFAgGkMfDK86TUA 04 ... 05 # gitolite end If everything worked, you
73%
Managing computers with Rex
31.10.2025
Home »  Archive  »  2012  »  Issue 11: Cloud...  » 
© Stanislav Rishnyak, 123RF.com
on the administrator's own machine, which even can be a Windows or Mac OS X machine; the only important thing is that you have a Perl environment in place. To install Rex, first pick up the git versioning tool (using
72%
Get the best out of your bandwidth with tc
30.11.2025
Home »  Archive  »  2012  »  Issue 10: Traff...  » 
© Russell Shively, 123RF.com
25Mbit allot 1514 cell 8 weight 2500Kbit prio 3 \maxburst 20 avpkt $PKT bounded 16 # Now add filters to your child class 17 tc filter add dev $DEV protocol ip parent 1:0 prio 100 u32 match ip $DIR 12
72%
Business continuity for small to medium-sized enterprises
30.11.2025
Home »  Archive  »  2012  »  Issue 08: FreeNAS  » 
© Andrea, Fotolia.com
) or even be booted in a virtual environment. This virtual boot function is perfect for smaller companies. It lets administrators boot a ShadowProtect image directly in the free VirtualBox [3] environment
72%
The next generation of Internet connectivity
30.11.2025
Home »  Archive  »  2011  »  Issue 3: Are yo...  » 
ktsdesign, 123RF.com
:%02x%02x\n' 19 83 20 235 Note that 6to4 relays (the machines that handle your traffic) use the anycast address of 192.88.99.1 (2002:c058:6301::), so finding out who is actually handling your traffic ... 3
71%
Using the Expect scripting environment
30.11.2025
Home »  Archive  »  2011  »  Issue 5: Pen Te...  » 
© Ivan Mikhaylov, 123RF.com
} 19 20 -re "($|%|>) " { interact } 21 22 timeout { 23 send_tty "No response from $host\n" 24 exit 25 } 26 } The script begins as usual by saving its arguments into variables
71%
Data acquisition with shell tools
30.11.2025
Home »  Archive  »  2010  »  Issue 2: Backup...  » 
Dmitriy Syechin, 123RF
vehicle=$(cat $i | grep "50|10|" | cut -d \| -f 3) 09 mileage=$(cat $i | grep "50|15|" | cut -d \| -f 3) 10 date=$(cat $i | grep "50|17|" | cut -d \| -f 3) 11 quantity=$(cat $i | grep "50|20|" | cut -d

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