OS/Linux Distributions using Apache

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You are viewing an outdated report. The latest version of this report was published on October 1st, 2024

August 1st, 2024

Report Description

The Apache server has in virtually any unbiased metric available (either from us or elsewhere) a majority market share in the web server market. Couple this with the fact that Apache will often provide hints as to the nature of the host OS it is running on, and one can view trends of linux distributions, how specialty OS' are performing in the server market and so on.

Methodology

The principal is simple: when issuing a request for a page to an Apache web server, the response received consists of HTTP Response Headers as well as the body of the web page being requested. For example, consider if we connect to a host on port 80 and request the root document. Our transaction might look something like this:


$ telnet 192.168.1.1 80
Trying 192.168.1.1...
Connected to 192.168.1.1.
Escape character is '^]'.
GET / HTTP/1.0

HTTP/1.1 200 OK
Date: Thu, 14 Feb 2008 16:24:24 GMT
Server: Apache/2.2.3 (Debian) DAV/2 PHP/4.4.4-8+etch4 mod_perl/2.0.2 Perl/v5.8.8
Last-Modified: Wed, 10 Oct 2007 14:01:07 GMT
ETag: "62c786-15eb-43c23eac2cec0"
Accept-Ranges: bytes
Content-Length: 5611
MS-Author-Via: DAV
Connection: close
Content-Type: text/html; charset=UTF-8

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">

<html>
...<snip>
</html>

The above response headers show the Server: header indicating the version of Apache, various add-on modules, as well as the fact that this platform is running the Debian linux distribution.

Reporting by Hostname (Sample size: 2,028,921 web sites)

It should be noted that not all web servers will report back the Host OS signature. In an Apache configuration file, the ServerTokens directive can be used to to disable the disclosure of this information. Only configurations that do not specify the ServerTokens directive, or set it to Full may reveal sufficient information to allow disclosure of the OS and distribution hosting the server.

In this month's survey, 13,903,140 Apache servers were detected, but only 2,028,921 (14.59%) revealed sufficient information to detect the host OS. The remainder of the survey by host information shown below is based on this subset of Apache servers that revealed the host OS.

OS/Distribution July 2024
Hostname Count July 2024
% June 2024
Hostname Count June 2024
% Growth
%

Debian 653,930 32.23 653,851 31.09 3.67

Ubuntu 621,226 30.62 644,386 30.64 -0.07

CentOS 613,294 30.23 655,938 31.19 -3.08

FreeBSD 51,866 2.56 53,091 2.52 1.27

Windows 30,082 1.48 34,730 1.65 -10.22

Red Hat 21,764 1.07 22,001 1.05 2.54

Fedora 19,587 0.97 21,436 1.02 -5.28

SuSE 12,162 0.60 12,279 0.58 2.67

Scientific Linux 1,444 0.07 1,739 0.08 -13.93

Turbolinux 848 0.04 856 0.04 2.69

Oracle 762 0.04 801 0.04 -1.39

Gentoo 724 0.04 729 0.03 2.95

Darwin 329 0.02 361 0.02 -5.53

Trustix 171 0.01 171 0.01 3.66

Mandriva 164 0.01 166 0.01 2.41

Sun Cobalt 153 0.01 162 0.01 -2.10

Mac OS X 83 0.00 83 0.00 3.66

OS/2 76 0.00 76 0.00 3.66

ASPLinux 53 0.00 59 0.00 -6.88

OpenVMS 47 0.00 51 0.00 -4.47

OpenPKG 37 0.00 37 0.00 3.66

Netware 33 0.00 35 0.00 -2.27

APMServ 21 0.00 20 0.00 8.84

BlueQuartz 19 0.00 20 0.00 -1.53

IBM 14 0.00 14 0.00 3.66

ALT Linux 13 0.00 14 0.00 -3.75

White Box 6 0.00 6 0.00 3.66

Asianux 5 0.00 8 0.00 -35.21

OpenNA 5 0.00 5 0.00 3.66

UnitedLinux 2 0.00 2 0.00 3.66

Lineox 1 0.00 1 0.00 3.66

Reporting by Installation (Sample size: 284,712 IP Addresses)

The following graph and table are based on the same underlying data set as in the previous graphs and table, but with the distinction that we count unique IP addresses instead of unique hostnames, thus getting a more accurate representation of the number of actual web servers installed. (See Web Survey by IP for more details).

In this month's survey, 1,221,734 distinct IP Addresses hosted Apache servers, but only 284,712 (23.30%) revealed sufficient information to detect the host OS. The data below is based on this subset of servers that revealed the host OS.

OS/Distribution July 2024
IP Address Count July 2024
% June 2024
IP Address Count June 2024
% Growth
%

Ubuntu 128,484 45.13 130,409 44.76 0.82

Debian 73,361 25.77 74,435 25.55 0.85

CentOS 60,216 21.15 63,151 21.68 -2.43

Windows 7,268 2.55 7,607 2.61 -2.23

FreeBSD 7,004 2.46 7,121 2.44 0.65

Fedora 2,965 1.04 3,017 1.04 0.56

Red Hat 2,767 0.97 2,868 0.98 -1.28

SuSE 1,545 0.54 1,577 0.54 0.25

Scientific Linux 407 0.14 440 0.15 -5.35

Oracle 193 0.07 204 0.07 -3.19

Turbolinux 146 0.05 147 0.05 1.63

Darwin 69 0.02 70 0.02 0.87

Mandriva 63 0.02 64 0.02 0.73

Gentoo 44 0.02 44 0.02 2.33

Sun Cobalt 42 0.01 46 0.02 -6.57

OpenVMS 21 0.01 22 0.01 -2.32

Netware 19 0.01 20 0.01 -2.79

OpenPKG 17 0.01 17 0.01 2.33

APMServ 14 0.00 13 0.00 10.20

OS/2 14 0.00 14 0.00 2.33

ASPLinux 12 0.00 12 0.00 2.33

Trustix 11 0.00 11 0.00 2.33

Mac OS X 7 0.00 7 0.00 2.33

BlueQuartz 6 0.00 6 0.00 2.33

ALT Linux 5 0.00 6 0.00 -14.73

White Box 3 0.00 3 0.00 2.33

Asianux 3 0.00 4 0.00 -23.25

IBM 2 0.00 2 0.00 2.33

OpenNA 2 0.00 2 0.00 2.33

UnitedLinux 1 0.00 1 0.00 2.33

Lineox 1 0.00 1 0.00 2.33

Note: Readers are cautioned that the Growth percentages are based on a server's market share penetration rather than the absolute number of servers we detected. Thus, it is possible for the number of servers to increase, while the growth is actually a negative value.

OS/Distribution	July 2024 Hostname Count	July 2024 %	June 2024 Hostname Count	June 2024 %	Growth %
Debian	653,930	32.23	653,851	31.09	3.67
Ubuntu	621,226	30.62	644,386	30.64	-0.07
CentOS	613,294	30.23	655,938	31.19	-3.08
FreeBSD	51,866	2.56	53,091	2.52	1.27
Windows	30,082	1.48	34,730	1.65	-10.22
Red Hat	21,764	1.07	22,001	1.05	2.54
Fedora	19,587	0.97	21,436	1.02	-5.28
SuSE	12,162	0.60	12,279	0.58	2.67
Scientific Linux	1,444	0.07	1,739	0.08	-13.93
Turbolinux	848	0.04	856	0.04	2.69
Oracle	762	0.04	801	0.04	-1.39
Gentoo	724	0.04	729	0.03	2.95
Darwin	329	0.02	361	0.02	-5.53
Trustix	171	0.01	171	0.01	3.66
Mandriva	164	0.01	166	0.01	2.41
Sun Cobalt	153	0.01	162	0.01	-2.10
Mac OS X	83	0.00	83	0.00	3.66
OS/2	76	0.00	76	0.00	3.66
ASPLinux	53	0.00	59	0.00	-6.88
OpenVMS	47	0.00	51	0.00	-4.47
OpenPKG	37	0.00	37	0.00	3.66
Netware	33	0.00	35	0.00	-2.27
APMServ	21	0.00	20	0.00	8.84
BlueQuartz	19	0.00	20	0.00	-1.53
IBM	14	0.00	14	0.00	3.66
ALT Linux	13	0.00	14	0.00	-3.75
White Box	6	0.00	6	0.00	3.66
Asianux	5	0.00	8	0.00	-35.21
OpenNA	5	0.00	5	0.00	3.66
UnitedLinux	2	0.00	2	0.00	3.66
Lineox	1	0.00	1	0.00	3.66

OS/Distribution	July 2024 IP Address Count	July 2024 %	June 2024 IP Address Count	June 2024 %	Growth %
Ubuntu	128,484	45.13	130,409	44.76	0.82
Debian	73,361	25.77	74,435	25.55	0.85
CentOS	60,216	21.15	63,151	21.68	-2.43
Windows	7,268	2.55	7,607	2.61	-2.23
FreeBSD	7,004	2.46	7,121	2.44	0.65
Fedora	2,965	1.04	3,017	1.04	0.56
Red Hat	2,767	0.97	2,868	0.98	-1.28
SuSE	1,545	0.54	1,577	0.54	0.25
Scientific Linux	407	0.14	440	0.15	-5.35
Oracle	193	0.07	204	0.07	-3.19
Turbolinux	146	0.05	147	0.05	1.63
Darwin	69	0.02	70	0.02	0.87
Mandriva	63	0.02	64	0.02	0.73
Gentoo	44	0.02	44	0.02	2.33
Sun Cobalt	42	0.01	46	0.02	-6.57
OpenVMS	21	0.01	22	0.01	-2.32
Netware	19	0.01	20	0.01	-2.79
OpenPKG	17	0.01	17	0.01	2.33
APMServ	14	0.00	13	0.00	10.20
OS/2	14	0.00	14	0.00	2.33
ASPLinux	12	0.00	12	0.00	2.33
Trustix	11	0.00	11	0.00	2.33
Mac OS X	7	0.00	7	0.00	2.33
BlueQuartz	6	0.00	6	0.00	2.33
ALT Linux	5	0.00	6	0.00	-14.73
White Box	3	0.00	3	0.00	2.33
Asianux	3	0.00	4	0.00	-23.25
IBM	2	0.00	2	0.00	2.33
OpenNA	2	0.00	2	0.00	2.33
UnitedLinux	1	0.00	1	0.00	2.33
Lineox	1	0.00	1	0.00	2.33