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By default rrdtool is not included in CentOS. You may need to install it for monitoring purpose. You can either use source to compile or install using rpm. But as I know CentOS 5 does not come with a repository that holds valid redhat style rpm’s for rrdtool. RRDTOOL is required by many network utilities, e.g cacti, nagios & many others to plot graphs.

So here is how we fix that and To install using rpm all you need is following two commands. Read the rest of this entry »

With the advantage of a user’s computer when browsing, this virus has infected at more than 4 million computers in 11 countries. DNSChanger virus spread quickly to millions of computers with internet use.

DNSChanger so that we can be categorized as one of the dangerous virus. “Spread the largest in the United States, that in Indonesia there is not much, at least about 50 thousand,” said Alfons Tanujaya, antivirus experts from Vaksincom Read the rest of this entry »

The following smartphone application allows the removal of an unwanted objects in a photograph. Of course he would be very helpful recording moments without any hassles.

For example, when users just want to take a friend with a background of a bustling tourist attraction. It will still be able to produce the desired image without interruption by the many people who bersliweran the location of the photo. Read the rest of this entry »

Sometimes, someone like to asking how do I check used and free RAM memory usage under Linux operating systems using command line. Linux comes with different set of commands to check memory usage. The free command displays the total amount of free and used physical and swap memory in the system, as well as the buffers used by the kernel. you can use the top command which provides a dynamic real-time view of a running system. It can display system summary information as well as a list of tasks currently being managed by the Linux kernel.

Free Command

Display free memory size in MB:
$ free -m Read the rest of this entry »

If you are asked to choose, what is more difficult to remove from everyday life: cigarettes, alcohol, or social networking? Surely the answer will vary.  However, a study revealed that many who answered ‘addicted’ to Twitter and Facebook is much more difficult to remove.

According to research conducted by the University of Chicago, many respondents surveyed claimed to have such a strong urge to sing or facebookan every day. Recognized that desire even greater than smoking and drinking alcohol. But still below the desire to have sex and sleep. Read the rest of this entry »

Operating System Windows 7, could be said most have a place in society because in addition to looking good in appearance, is also more secure online protection. But did you know that we are windows 7 can also get around to make it look faster, especially perfomancenya on your PC / laptop us.

Of course with a variety of tips and trick you can try.

Disable unneeded services

The following services can be set to manual: Read the rest of this entry »