Help:Installing more than one wiki on one server

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1. Create its directory. The simplest way is just to unpack the MediaWiki archive and then rename its directory (e.g., mv mediawiki-VERSION mynewwiki). We renamed the directory to the two letter abbreviation of the language that the particular installation would be used for.
2. Give it a database. You can use the same database for multiple wikis just by giving each one a unique prefix. The prefix is specified when you fill out the form in the config directory. This is the method we used to setup the databases for the different language installations. We used the two letter ISO abbreviation for the language along with an underscore as the prefix. For example, the prefix for the english installation was: 'en_'.
3. Load the installation directory in your web browser, if necessary. It depends on your setup. If all your wikis have the same parent directory and use the same hostname, you may not need to do anything here. To start the web installation script load the url: http://127.0.0.1/[wiki]/ in the browser, substituting [wiki] for the name of the new wiki's instal directory. In our case this would be the ISO country code:
   1. specify the language of the new installation in the appropriate drop-down menu
   2. specify a (different) table name prefix on the configuration page. We used the ISO country code convention again. So for example a french wiki would use the prefix fr_
   3. the remaining entries should be the same as the original installation

Additionally, you may want to make some settings common for all the installations, and have a central place where changes to these can be made. Since the configuration file (LocalSettings.php) is executed as PHP code, this can be done with PHP's inclusion mechanism - for instance, by adding the line include_once("../CommonSettings.php") in each LocalSettings.php, and placing settings which apply to all wikis in ../CommonSettings.php.

If you have a large number of wikis on one host, you may not want to keep a separate copy of the source code for every one. Instead, extract the source somewhere, and for each wiki installation, symlink "index.php", "math", "images" and "style" in the htroot to the equivalent directory in the MediaWiki source. You can then either use a separate LocalSettings.php for each wiki, or (easier) determine the settings based on the URL. See also Wiki farm.

If you want your login to be persistent across Wiki's running on the same server, simply add the following line to your LocalSettings.php after $wgSiteName = ... :

ini_set("session.name", "{$wgSitename}Session" );

Language Abbreviations, ISO 639: 2-letter codes

AA "Afar"
AB "Abkhazian"
AF "Afrikaans"
AM "Amharic"
AR "Arabic"
AS "Assamese"
AY "Aymara"
AZ "Azerbaijani"
BA "Bashkir"
BE "Byelorussian"
BG "Bulgarian"
BH "Bihari"
BI "Bislama"
BN "Bengali" "Bangla"
BO "Tibetan"
BR "Breton"
CA "Catalan"
CO "Corsican"
CS "Czech"
CY "Welsh"
DA "Danish"
DE "German"
DZ "Bhutani"
EL "Greek"
EN "English" "American"
EO "Esperanto"
ES "Spanish"
ET "Estonian"
EU "Basque"
FA "Persian"
FI "Finnish"
FJ "Fiji"
FO "Faeroese"
FR "French"
FY "Frisian"
GA "Irish"
GD "Gaelic" "Scots Gaelic"
GL "Galician"
GN "Guarani"
GU "Gujarati"
HA "Hausa"
HI "Hindi"
HR "Croatian"
HU "Hungarian"
HY "Armenian"
IA "Interlingua"
IE "Interlingue"
IK "Inupiak"
IN "Indonesian"
IS "Icelandic"
IT "Italian"
IW "Hebrew"
JA "Japanese"
JI "Yiddish"
JW "Javanese"
KA "Georgian"
KK "Kazakh"
KL "Greenlandic"
KM "Cambodian"
KN "Kannada"
KO "Korean"
KS "Kashmiri"
KU "Kurdish"
KY "Kirghiz"
LA "Latin"
LN "Lingala"
LO "Laothian"
LT "Lithuanian"
LV "Latvian" "Lettish"
MG "Malagasy"
MI "Maori"
MK "Macedonian"
ML "Malayalam"
MN "Mongolian"
MO "Moldavian"
MR "Marathi"
MS "Malay"
MT "Maltese"
MY "Burmese"
NA "Nauru"
NE "Nepali"
NL "Dutch"
NO "Norwegian"
OC "Occitan"
OM "Oromo" "Afan"
OR "Oriya"
PA "Punjabi"
PL "Polish"
PS "Pashto" "Pushto"
PT "Portuguese"
QU "Quechua"
RM "Rhaeto-Romance"
RN "Kirundi"
RO "Romanian"
RU "Russian"
RW "Kinyarwanda"
SA "Sanskrit"
SD "Sindhi"
SG "Sangro"
SH "Serbo-Croatian"
SI "Singhalese"
SK "Slovak"
SL "Slovenian"
SM "Samoan"
SN "Shona"
SO "Somali"
SQ "Albanian"
SR "Serbian"
SS "Siswati"
ST "Sesotho"
SU "Sudanese"
SV "Swedish"
SW "Swahili"
TA "Tamil"
TE "Tegulu"
TG "Tajik"
TH "Thai"
TI "Tigrinya"
TK "Turkmen"
TL "Tagalog"
TN "Setswana"
TO "Tonga"
TR "Turkish"
TS "Tsonga"
TT "Tatar"
TW "Twi"
UK "Ukrainian"
UR "Urdu"
UZ "Uzbek"
VI "Vietnamese"
VO "Volapuk"
WO "Wolof"
XH "Xhosa"
YO "Yoruba"
ZH "Chinese"
ZU "Zulu"