Even if you are not specified a message size limit in your main.cf configuration file, postfix server has a default size limit. By using following command you can see the current limit. kok@postaci:/etc/postfix$ postconf | grep message_size_limit message_size_limit = 10240000 You can add (or modify if you already defined it) message_size_limit parameter to your main.cf [...]

If you are producing documents in different languages then probably you would like to install dictionaries for different languages. Today I needed to install Dutch spell-checker on my Ubuntu system. Ubuntu provides packages for supporting different languages. With following command you can list all the support packages. sudo apt-cache search openoffice.org-l10n-* For Dutch language support [...]

For sometime I have been using CardioTrainer application on my Adroid telephone. It is a free application. Using the build-in GPS on your telephone it records your workout route. After your workout you can see your route and distance and several other statistics. You to choose different workout type like running / cycling etc. One [...]

There are two possible ways for adding a default gateway. Option 1: You can add a gateway definition to  the /etc/sysconfig/network file. This definition will apply to all network interfaces. Let’s say that your gateway is 192.168.4.1,  then you need to add the following line to /etc/sysconfig/network file. GATEWAY=192.168.4.1 Option 2: You can define a [...]

After doing a kernel upgrade, default kernel configuration in GRUB config will be automatically update. On Redhat based systems you can change this behavior by modifying /etc/sysconfig/kernel file. You need to set the UPDATEDEFAULT to no. UPDATEDEFAULT=no service

Redhat bases systems are using yum as their package manager. Yum repository definitions are stored in .repo files located in /etc/yum.repos.d/ directory and by adding a new file repo file you can define additional repositories. This file needs to contain at least following information. [repositoryid] name=Some name for this repository baseurl=url://path/to/repository/ repositoryid is need to [...]

I have an Ubuntu Virtualization Server which I have been using for a quite some time. Now that Ubuntu 9.10 released I would like to upgrade it to the Ubuntu 9.10 Karmic release. First you need to install the update-manager-core package. kok@fhome:~$ sudo apt-get install update-manager-core After installing the update-manager-core package, complete upgrade procedure is [...]

By default Apache server is configured in a way that it sends detailed information about it’s configuration (apache version number, compiled modules, etc). For production environments this information would be unnecessary. It is better not to publish it at all. Using the ServerTokens directive you can control the amount of information being sent to the [...]

libvirt creates a separate xml file for each of your virtual machines. On my Ubuntu server profiles of my kvm machines are stored in the /etc/libvirt/qemu folder. Boot media for your virtual machine is defined inside the os element. Below you can see an extract from one of my virtual machine.  <os>     <type arch=’i686′ [...]

During one of my latest projects I needed an radius client to troubleshoot a problem. For that purpose I have used the free NTRadPing utility. It is an free windows based radius client and it simplifies our investigation process. You can download it from here .