Very long-term persistent cookies are 6 times more common on Windows-based websites than on Unix-based sites.

61.8% of .edu websites run on Windows, while 64.9% of all websites run on Unix-like systems.

The share of Red Hat among Linux distributions on web servers has dropped to 10%.

After three years of catching up, Windows is now losing web server market share to Unix-like systems.

Ubuntu is now used on 7% of all web servers, up from 5.5% one year ago.

85.1% of US Government (.gov) sites run on Windows, compared to 35.9% of all web sites.

After a long period of decline, usage of Gentoo for web servers is rising again.

30.1% of all Linux-based websites run one of the established content management systems, but only 9.8% of Windows-based sites.

Debian is gaining websites from Red Hat, Centos and Fedora, but losing some to Ubuntu.

94.7% of the web servers in Uzbekistan run on Unix-like systems. More than anywhere else in the world.

Most popular Linux distributions running on the servers of the top 1.000 websites:

1. Ubuntu, 2. Debian, 3. CentOS, 4. Red Hat

Changes in the usage of Linux distributions on web servers in the last year:
Debian-based (Debian, Ubuntu): +7.4%
Red Hat-based (Red Hat, CentOS, Fedora, Scientific Linux): -6.0%

86.6% of the web servers in Saudi Arabia run on Windows. More than anywhere else in the world.

Brazil is the only South American country where Windows dominates the web server market against Unix-like systems.

Debian runs on 50.3% of all Hungarian web servers.

Every 36 minutes one of the top 1 million websites switches its servers to Ubuntu.

Scientific Linux is still a niche system on web servers, but it more than quadrupled in the last year.

Ubuntu is now used on 6% of all web servers, up from 4% one year ago.

Debian has surpassed CentOS to become the most popular Linux distribution on web servers.

81% of ColdFusion sites run on Windows.

72.8% of the web servers that use Silverlight as client-side language run on Unix.

Windows may dominate the desktop, but Unix-like operating systems (and that includes Linux) are used on 64% of web servers. We have a closer look at the statistics.

CentOS is gaining market share on web servers from Red Hat and Fedora, but losing to Debian and Ubuntu: Changes in the usage of CentOS.

73.6% of German websites run on Linux, but only 6.9% of Chinese ones: Usage of Linux by top level domains.

36% of all websites run on Windows, but 78% of Chinese language sites: Operating Systems on Chinese sites

Ubuntu now ahead of Red Hat in Linux usage for web servers. Still behind CentOS and Debian: Usage of Linux distribution

Ubuntu has been a popular Linux distribution on desktop systems for some time. Now it is also increasing its market share on web servers. We have a closer look at the statistics.

CentOS is a well known Linux distribution with a strong focus on server machines rather than on desktop PCs. For the first time, CentOS is now leading the Linux distribution statistics on web servers with almost 30% of all Linux servers.