Archive for the tag 'linux'



May 11 2013

Freeradius Usage Graphs

Published by under Freeradius

Radius servers generate a lot of accounting records. Is it worth keeping them? Of course! Beside the fact they could be used to check if a customer was connected at a given date, or find out who got IP address X.X.X.X that same day, the most interesting is to generate Freeradius traffic usage graphs and […]

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May 01 2013

Change Linux Keyboard

Published by under Linux

One can change the current session keyboard mapping with loadkeys. To load the French keyboard map, simply run loadkeys fr   Available keymaps can be found in /lib/kbd/keymaps/ You can even create your own

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Nov 30 2012

IPTables Traffic Redirection on Linux

Published by under Linux

Whether you need to redirect telnet or ssh connections through a server because you don’t have direct access to your final destination or you’re planning a web server migration, traffic forwarding comes in handy in many situations.This is easily achieved on Linux distributions that come with IPtables. Yes, iptables isn’t just for ACL rules, but […]

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Feb 23 2011

MSA 2012i SAN Performance Windows vs Linux

Published by under Storage

I’ve noticed backups are getting slower and slower over time going from 500 to 2500MB/min throughput. I run backups on 2 dedicated RAID0 disks hosted on a iSCSI MSA array first, and duplicate them on tapes. Since I want to use the same array for a new database project, I want to measure and tune […]

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Jan 14 2011

Multipath on iSCSI Disks and LVM Partitions on Linux

Published by under Linux,Storage

Here are a few steps to configure iSCSI disks on Linux. Although I set this up on a Redhat Enterprise connected to an HP MSA 2012i, the whole configuration remains generic and can be applied to any SAN.I will add another post to check how both Linux and Windows perform on the same iSCSI device, […]

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