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100%
Give your servers the once over with Nmap
31.10.2025
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»
Archive
»
2012
»
Issue 11: Cloud...
»
.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
93%
openlava – Hot resource manager
31.10.2025
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Archive
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2012
»
Issue 12: NAS S...
»
tmp DISPATCH_WINDOW # Keywords test1 0 () () () () () ()
n
0001
3
() () () () () () default
93%
Netcat – The admin's best friend
31.10.2025
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2012
»
Issue 12: NAS S...
»
seconds, for example: # nc -p 16000 -w 30 examplehost.tld
22
If firewalling is in place and you need to originate your connection from a specific IP address to open a port, then you can enter: # nc -s 1.2.
3
92%
Security without firewalls
31.10.2025
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Archive
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2012
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Issue 12: NAS S...
»
and then explicitly allow certain users access. It's similar to the deny by default approach I touched on in another article [
3
]. To achieve this, the /etc/hosts.deny file would look like this: sshd: ALL To allow
92%
Managing virtual infrastructures with oVirt 3.1
31.10.2025
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2012
»
Issue 11: Cloud...
»
.1_release_notes oVirt Installation Guide: http://www.ovirt.org/w/images/
a/a
9
/OVirt-
3
.0-Installation_Guide-en-US.pdf ... Version
3
.1 of the oVirt management platform for virtual infrastructures has recently become available. On Fedora 17, the new release is easy to install and deploy. ... oVirt
3
.1 ... Managing virtual infrastructures with oVirt
3
.1
91%
Creating and evaluating kernel crash dumps
31.10.2025
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Archive
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2012
»
Issue 11: Cloud...
»
kernel sles:~ # grep crash /proc/cmdline root=/dev/disk/by-uuid/10
a
83ffe-5
a
9
f-48
a
2-b8cb-551c2cc6b42d resume=/dev/sda
3
splash=silent text showopts crashkernel=128 sles:~ # /etc/init.d/boot.kdump status
90%
Dynamic routing in Linux with Quagga
31.10.2025
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»
Archive
»
2012
»
Issue 12: NAS S...
»
password 8 ZDF339
a
.20
a
3
E 05 log file /var/log/quagga/zebra.log 06 service password-encryption 07 ! 08 interface eth0 09 multicast 10 ipv6 nd suppress-ra 11 ! 12 interface eth1 13 ip address 10
88%
Moving HPC to the cloud
31.10.2025
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2012
»
Issue 11: Cloud...
»
of options, including dual four-core Xeon, dual six-core Xeon, or quad 12-core AMD processors ranging in speed from
2.2
to 2.
9
GHz with 24 to 128GB of RAM per server and up to 1TB of scratch local storage per