Archive for October, 2009

Linux on VMware Time Sync

It is a common problem on virtual machines to loose time synchronization with the hardware clock. This can lead to serious problems regarding services operations as well as log consolidation. VMware’ s knowledge base has lot of information regarding the issue. We choose to implement NTP time synchronization on our Datacenter, thus the only option […]

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Roundcube WebMail on CPanel Servers

Roundcube webmail is a very promising Open Source webmail client. With CPanel 11 installing RoundCube is quite easy and with no file editing of CPanel files. To install roundcube you should first download RoundCube Webmail from http://roundcube.net/ . Unzip the software somewhere and upload all files and folders (maybe with WinSCP) to your server in […]

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Exim Ignore MX Record

There are some cases where you want to ignore the configured MX record in order to deliver e-mails for a domain and instead deliver them to a preconfigured server. A very common situation where you want to do this is when you provide advanced anti virus and anti spam solutions to your clients. In those […]

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Samba PDC and Kolab

Our project is to replace in our corporate all MS Windows servers. The new environment should be compatible with simple users habits and the transition from Microsoft servers to Linux servers must be completely transparent to the end user. The first step towards this is to provide a Windows Domain functionality with Samba Server v3. […]

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MySQL Usage Limit

It usually happens on a server to have high load for no apparent reason. My experience have shown that most of the times this high load is due to badly written SQL queries which cause MySQL to use all available resources for lots of time. This also causes an an excessive number of connections as […]

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