How to Add Swap on Ubuntu

Linux RAM is composed of chunks of memory called pages. To free up pages of RAM, a “linux swap” can occur and a page of memory is copied from the RAM to preconfigured space on the hard disk. Linux swaps allow a system to harness more memory than was originally physically available.

However, swapping does have disadvantages. Because hard disks have a much slower memory than RAM, virtual private server performance may slow down considerably. Additionally, swap thrashing can begin to take place if the system gets swamped from too many files being swapped in and out. Continue reading

MySQL Master Slave replication

MySQLSometimes it might be usefull or even needed to replicate data from one place to another. If you have data you want to replicate in MySQL database, you are lucky, because replication is integrated in MySQL by default and you just have to set it up. Continue reading

How to Create a SSL Certificate on Apache for Ubuntu 12.04

About Self-Signed Certificates

A SSL certificate is a way to encrypt a site’s information and create a more secure connection. Additionally, the certificate can show the virtual private server’s identification information to site visitors. Certificate Authorities can issue SSL certificates that verify the server’s details while a self-signed certificate has no 3rd party corroboration. Continue reading

How to Install and Configure Dropbox on Ubuntu Server 12.04

Dropbox is the best free cloud service and extremely easy-to-use tool for sharing files and syncing them between computers, and you can also use Dropbox to back up files and access them from other computers and devices (including from your Android Smartphone, android tablets and iPad or iPhone, with dedicated Client apps for each of those devices). How to make dropbox features and services available on ubuntu server?

in this post I would like to show you step by step How to Install Dropbox on Ubuntu Server 12.04 and Sync up to your Dropbox Account. Lets start it. Continue reading

How to check which process is listening on which port

Here’s a few built-in commands and how to guide that can help users to find out and identify which application or process that is already using, opening and listening on port 80 or 443 on the Winodws operating system such as Windows Vista, Windows XP, Windows 7, Windows Server 2003 and 2008. Continue reading

Move Ubuntu in VirtualBox from one PC to another

Export and import of any virtual box machine from one PC to another is done simply by “File – Export Appliance” and “File – Import Appliance” in Oracle Virtual Box top menu.

But it happened to me that I exported and imported an Ubuntu machine and internet connection was not working in the imported appliance. After a long research and google searching I found a possible way how to fix it. Continue reading

Ubuntu 12 as Home server running in Virtualbox

I always wanted to have personal home server which can host a web service with PHP, PERL, Python and MySQL, FTP or WebDAV services, Subversion service or stream multimedia.

At the same time I didn’t want to have huge installation with GUI which will become useless when everything is correctly setup and also consumes some disk space but I wanted to have some easy access to the machine so I can configure it or do some maintenance if needed.

Here is the step-by step description of how I setup my personal home server. Continue reading