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Low client and server requirements are core features that keep TWiki widely deployable, particularly across a range of browser platforms and versions.
 Server Requirements 
TWiki is written in Perl 5, uses a number of shell commands, and requires RCS (Revision Control System), a GNU Free Software package. TWiki is developed in a basic Linux/Apache environment. It also works with Microsoft Windows, and should have no problem on any other platform that meets the requirements.
|  Resource  | 
 Required Server Environment *  | 
 
|  Perl  | 
 5.005_03 or higher (5.6.1 recommended, 5.8.x does work in most cases, but see TWiki:Codev.IssuesWithPerl5dot8)  | 
 
|  Non-standard Perl modules  | 
 • Unix: Net::SMTP (or sendmail)  • Windows: Net::SMTP, MIME::Base64, Digest::SHA1  • Internationalisation: Unicode::MapUTF8   (only for non-ISO-8859-1 sites using TWiki:Codev.EncodeURLsWithUTF8 with Perl 5.6 or lower)  | 
 
|  RCS  | 
 5.7 or higher (including GNU diff)    Optional, but the all-Perl RCS replacement is not currently recommended for live sites - see TWiki:Codev.RcsLite  | 
 
 GNU diff  | 
 GNU diff 2.7 or higher is required when not using the all-Perl RcsLite.     Install on PATH if not included with RCS (check version with diff -v)     Must be the version used by RCS, to avoid problems with binary attachments - RCS may have hard-coded path to diff  | 
 
|  Other external programs  | 
 fgrep, egrep  | 
 
|  Cron/scheduler  | 
 • Unix: cron  • Windows: cron equivalents  | 
 
|  Web server  | 
 Apache 1.3 is well supported; Apache 2.0 is not recommended yet (see TWiki:Codev.IssuesWithApache2dot0).    For other servers, CGI support, authentication, extended path info required; also, the register script is likely to need significant changes  | 
  
  * Current documentation mainly covers Linux and Apache installations. See WindowsInstallCookbook for a Windows installation guide.  See TWiki:Codev.TWikiOn for help with installation on various platforms including Unix, MacOS X, Apache mod_perl, web hosts, etc.
 Client Requirements 
The TWiki standard installation has extremely low browser requirements:
 
-  HTML 3.2 compliant
  -  generates XHTML 1.0 pages that are compatible with HTML 3.2
  -  minimal use of JavaScript in the user interface (degrades gracefully)
  -  no cookies
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You can easily add functionality, by customizing TWikiTemplates, for one, while tailoring the browser requirements to your situation. 
 Known Issues 
 
-  The TWikiPlugins feature currently does not have compatibility guidelines for developers. Plugins can require just about anything -  browser-specific functions, stylesheets (CSS), Java applets, cookies, specific Perl modules,... - check the individual Plugin specs. 
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  Plugins included in the TWiki distribution do not add requirements.
   
   
-- TWiki:Main.MikeMannix - 12 Jan 2002   
-- TWiki:Main.PeterThoeny - 15 Aug 2004
|  META TOPICMOVED  | 
 by="PeterThoeny" date="1042701667" from="TWiki.TWikiImplementationNotes" to="TWiki.TWikiSystemRequirements"  | 
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