Changes between Version 6 and Version 7 of TracInstall


Ignore:
Timestamp:
Nov 21, 2023, 2:32:22 PM (13 months ago)
Author:
trac
Comment:

--

Legend:

Unmodified
Added
Removed
Modified

  • TracInstall

    v6 v7  
    1 = Trac Installation Guide for 1.2
     1= Trac Installation Guide for 1.5
    22[[TracGuideToc]]
    33
    4 Trac is written in the Python programming language and needs a database, [http://sqlite.org/ SQLite], [http://www.postgresql.org/ PostgreSQL], or [http://mysql.com/ MySQL]. For HTML rendering, Trac uses the [http://genshi.edgewall.org Genshi] templating system.
     4Trac is written in the Python programming language and needs a database, [https://sqlite.org/ SQLite], [https://www.postgresql.org/ PostgreSQL], or [https://mysql.com/ MySQL]. For HTML rendering, Trac uses the [http://jinja.pocoo.org Jinja2] templating system, though Genshi templates are supported until Trac 1.5.1.
    55
    66Trac can also be localized, and there is probably a translation available in your language. If you want to use the Trac interface in other languages, then make sure you have installed the optional package [#OtherPythonPackages Babel]. Pay attention to the extra steps for localization support in the [#InstallingTrac Installing Trac] section below. Lacking Babel, you will only get the default English version.
    77
    8 If you're interested in contributing new translations for other languages or enhancing the existing translations, then please have a look at [trac:wiki:TracL10N TracL10N].
    9 
    10 What follows are generic instructions for installing and setting up Trac. While you may find instructions for installing Trac on specific systems at [trac:TracInstallPlatforms TracInstallPlatforms], please '''first read through these general instructions''' to get a good understanding of the tasks involved.
     8If you're interested in contributing new translations for other languages or enhancing the existing translations, please have a look at [trac:wiki:TracL10N TracL10N].
     9
     10These are generic instructions for installing and setting up Trac. While you may find instructions for installing Trac on specific systems at [trac:TracInstallPlatforms TracInstallPlatforms], please '''first read through these general instructions''' to get a good understanding of the tasks involved.
    1111
    1212[[PageOutline(2-3,Installation Steps,inline)]]
    … …  
    1414== Dependencies
    1515=== Mandatory Dependencies
     16
    1617To install Trac, the following software packages must be installed:
    1718
    18  * [http://www.python.org/ Python], version >= 2.6 and < 3.0
    19    (note that we dropped the support for Python 2.5 in this release)
    20  * [http://pypi.python.org/pypi/setuptools setuptools], version >= 0.6
    21  * [http://genshi.edgewall.org/wiki/Download Genshi], version >= 0.6
    22 
    23 You also need a database system and the corresponding python bindings. The database can be either SQLite, PostgreSQL or MySQL.
     19 * [https://www.python.org/ Python], version >= 3.5
     20 * [https://pypi.org/project/setuptools setuptools], version > 5.6
     21 * [https://pypi.org/project/Jinja2 Jinja2], version >= 2.9.3
     22
     23You also need a database system and the corresponding Python bindings. The database can be either SQLite, PostgreSQL or MySQL.
    2424
    2525==== For the SQLite database #ForSQLite
    2626
    27 As you must be using Python 2.6 or 2.7, you already have the SQLite database bindings bundled with the standard distribution of Python (the `sqlite3` module).
    28 
    29 Optionally, you may install a newer version of [http://pypi.python.org/pypi/pysqlite pysqlite] than the one provided by the Python distribution. See [trac:PySqlite#ThePysqlite2bindings PySqlite] for details.
     27You already have the SQLite database bindings bundled with the standard distribution of Python (the `sqlite3` module).
     28
     29Optionally, you may install a newer version of [https://pypi.org/project/pysqlite pysqlite] than the one provided by the Python distribution. See [trac:PySqlite#ThePysqlite2bindings PySqlite] for details.
    3030
    3131==== For the PostgreSQL database #ForPostgreSQL
    3232
    3333You need to install the database and its Python bindings:
    34  * [http://www.postgresql.org/ PostgreSQL], version 8.0 or later
    35  * [http://pypi.python.org/pypi/psycopg2 psycopg2], version 2.0 or later
     34 * [https://www.postgresql.org/ PostgreSQL], version 9.1 or later
     35 * [https://pypi.org/project/psycopg2 psycopg2], version 2.5 or later
    3636
    3737See [trac:DatabaseBackend#Postgresql DatabaseBackend] for details.
    … …  
    3939==== For the MySQL database #ForMySQL
    4040
    41 Trac works well with MySQL, provided you follow the guidelines:
    42 
    43  * [http://mysql.com/ MySQL], version 5.0 or later
    44  * [http://sf.net/projects/mysql-python MySQLdb], version 1.2.2 or later
     41Trac works well with MySQL, provided you use the following:
     42
     43 * [https://mysql.com/ MySQL], version 5.0 or later
     44 * [https://pypi.org/project/PyMySQL PyMySQL]
    4545
    4646Given the caveats and known issues surrounding MySQL, read carefully the [trac:MySqlDb] page before creating the database.
    … …  
    5050==== Subversion
    5151
    52 [http://subversion.apache.org/ Subversion], 1.6.x or later and the '''''corresponding''''' Python bindings.
    53 
    54 There are [http://subversion.apache.org/packages.html pre-compiled SWIG bindings] available for various platforms. (Good luck finding precompiled SWIG bindings for any Windows package at that listing. [trac:TracSubversion] points you to [http://alagazam.net Alagazam], which works for me under Python 2.6.)
    55 
    56 For troubleshooting information, see the [trac:TracSubversion#Troubleshooting TracSubversion] page.
     52[https://subversion.apache.org/ Subversion], 1.14.x or later and the '''corresponding''' Python bindings.
     53
     54There are [https://subversion.apache.org/packages.html pre-compiled SWIG bindings] available for various platforms. See [trac:TracSubversion#GettingSubversion getting Subversion] for more information.
    5755
    5856{{{#!div style="border: 1pt dotted; margin: 1em"
    5957**Note:**
    60 * Trac '''doesn't''' use [http://pysvn.tigris.org/ PySVN], nor does it work yet with the newer `ctype`-style bindings.
    61 * If using Subversion, Trac must be installed on the '''same machine'''. Remote repositories are currently [trac:ticket:493 not supported].
    62 }}}
     58* Trac '''doesn't''' use [https://pypi.org/project/PySVN PySVN], nor does it work yet with the newer `ctype`-style bindings.
     59* If using Subversion, Trac must be installed on the '''same machine'''. Remote repositories are [trac:ticket:493 not supported].
     60}}}
     61
     62For troubleshooting information, see the [trac:TracSubversion#Troubleshooting TracSubversion] page.
    6363
    6464==== Git
    6565
    66 [http://git-scm.com/ Git] 1.5.6 or later is supported. More information is available on the [trac:TracGit] page.
     66[https://git-scm.com/ Git] 1.5.6 or later is supported. More information is available on the [trac:TracGit] page.
    6767
    6868==== Other Version Control Systems
    … …  
    7171
    7272==== Web Server
     73
    7374A web server is optional because Trac is shipped with a server included, see the [#RunningtheStandaloneServer Running the Standalone Server] section below.
    7475
    7576Alternatively you can configure Trac to run in any of the following environments:
    76  * [http://httpd.apache.org/ Apache] with
    77   * [https://github.com/GrahamDumpleton/mod_wsgi mod_wsgi], see [wiki:TracModWSGI] and [http://code.google.com/p/modwsgi/wiki/IntegrationWithTrac ModWSGI IntegrationWithTrac].
    78   * [http://modpython.org/ mod_python 3.5.0], see TracModPython
    79  * a [http://www.fastcgi.com/ FastCGI]-capable web server (see TracFastCgi)
    80  * an [http://tomcat.apache.org/connectors-doc/ajp/ajpv13a.html AJP]-capable web
    81    server (see [trac:TracOnWindowsIisAjp TracOnWindowsIisAjp])
     77 * [https://httpd.apache.org/ Apache] with
     78   - [https://github.com/GrahamDumpleton/mod_wsgi mod_wsgi], see [wiki:TracModWSGI] and
     79     [https://code.google.com/p/modwsgi/wiki/IntegrationWithTrac ModWSGI IntegrationWithTrac].
     80   - [http://modpython.org/ mod_python 3.5.0], see TracModPython
     81 * a [https://fastcgi-archives.github.io FastCGI]-capable web server (see TracFastCgi)
     82 * an [https://tomcat.apache.org/connectors-doc/ajp/ajpv13a.html AJP]-capable web server (see [trac:TracOnWindowsIisAjp TracOnWindowsIisAjp])
    8283 * Microsoft IIS with FastCGI and a FastCGI-to-WSGI gateway (see [trac:CookBook/Installation/TracOnWindowsIisWfastcgi IIS with FastCGI])
    83  * a CGI-capable web server (see TracCgi), '''but usage of Trac as a cgi script
    84    is highly discouraged''', better use one of the previous options.
    85    
     84 * a CGI-capable web server (see TracCgi), '''but usage of Trac as a cgi script is highly discouraged''', better use one of the previous options.
    8685
    8786==== Other Python Packages
    8887
    89  * [http://babel.edgewall.org Babel], version 0.9.6 or >= 1.3,
    90    needed for localization support
    91  * [http://docutils.sourceforge.net/ docutils], version >= 0.3.9
    92    for WikiRestructuredText.
    93  * [http://pygments.org Pygments] for
    94    [TracSyntaxColoring syntax highlighting].
    95  * [http://pytz.sf.net pytz] to get a complete list of time zones,
    96    otherwise Trac will fall back on a shorter list from
    97    an internal time zone implementation.
     88 * [http://babel.pocoo.org Babel], version >= 2.2, needed for localization support
     89 * [http://pytz.sourceforge.net pytz] to get a complete list of time zones, otherwise Trac will fall back on a shorter list from an internal time zone implementation. Installing Babel will install pytz.
     90 * [http://docutils.sourceforge.net docutils], version >= 0.14, for WikiRestructuredText.
     91 * [http://pygments.org Pygments], version >= 1.0, for [TracSyntaxColoring syntax highlighting].
     92 * [https://pypi.org/project/textile Textile], version >= 2.3, for rendering the [https://github.com/textile/python-textile Textile markup language].
     93 * [https://pypi.org/project/passlib passlib] on Windows to decode [TracStandalone#BasicAuthorization:Usingahtpasswdpasswordfile htpasswd formats] other than `SHA-1`.
     94 * [https://pypi.org/project/pyreadline pyreadline] on Windows for trac-admin [TracAdmin#InteractiveMode command completion].
    9895
    9996{{{#!div style="border: 1pt dotted; margin: 1em"
    … …  
    109106It is assumed throughout this guide that you have elevated permissions as the `root` user or by prefixing commands with `sudo`. The umask `0002` should be used for a typical installation on a Unix-based platform.
    110107
    111 === Using `easy_install`
    112 Trac can be installed from PyPI or the Subversion repository using [http://pypi.python.org/pypi/setuptools setuptools].
    113 
    114 A few examples:
    115 
    116  - Install the latest stable version of Trac:
    117  {{{#!sh
    118 $ easy_install Trac
    119 }}}
    120  - Install latest development version:
    121  {{{#!sh
    122 $ easy_install http://download.edgewall.org/trac/Trac-latest-dev.tar.gz
    123 }}}
    124    Note that in this case you won't have the possibility to run a localized version of Trac;
    125    either use a released version or install from source
    126 
    127 More information can be found on the [trac:wiki:setuptools setuptools] page.
    128 
    129 {{{#!div style="border: 1pt dotted; margin: 1em"
    130 **Setuptools Warning:** If the version of your setuptools is in the range 5.4 through 5.6, the environment variable `PKG_RESOURCES_CACHE_ZIP_MANIFESTS` must be set in order to avoid significant performance degradation. More information may be found in [#DeployingTrac Deploying Trac].
    131 }}}
    132 
    133108=== Using `pip`
    134 'pip' is an easy_install replacement that is very useful to quickly install python packages.
    135 To get a Trac installation up and running in less than 5 minutes:
    136 
    137 Assuming you want to have your entire pip installation in `/opt/user/trac`
    138 
    139  {{{#!sh
    140 $ pip install trac psycopg2
    141 }}}
    142 or
    143  {{{#!sh
    144 $ pip install trac mysql-python
    145 }}}
    146 
    147 Make sure your OS specific headers are available for pip to automatically build PostgreSQL (`libpq-dev`) or MySQL (`libmysqlclient-dev`) bindings.
    148 
    149 pip will automatically resolve all dependencies (like Genshi, pygments, etc.), download the latest packages from pypi.python.org and create a self contained installation in `/opt/user/trac`.
    150 
    151 All commands (`tracd`, `trac-admin`) are available in `/opt/user/trac/bin`. This can also be leveraged for `mod_python` (using `PythonHandler` directive) and `mod_wsgi` (using `WSGIDaemonProcess` directive)
    152 
    153 Additionally, you can install several Trac plugins (listed [https://pypi.python.org/pypi?:action=browse&show=all&c=516 here]) through pip.
    154 
    155 === From source
    156 Using the python-typical setup at the top of the source directory also works. You can obtain the source for a .tar.gz or .zip file corresponding to a release (e.g. `Trac-1.0.tar.gz`) from the [trac:TracDownload] page, or you can get the source directly from the repository. See [trac:TracRepositories#OfficialSubversionrepository TracRepositories] for details.
    157 
    158 {{{#!sh
    159 $ python ./setup.py install
    160 }}}
    161 
    162 ''You will need root permissions or equivalent for this step.''
    163 
    164 This will byte-compile the Python source code and install it as an .egg file or folder in the `site-packages` directory
    165 of your Python installation. The .egg will also contain all other resources needed by standard Trac, such as `htdocs` and `templates`.
    166 
    167 If you install from source and want to make Trac available in other languages, make sure Babel is installed. Only then, perform the `install` (or simply redo the `install` once again afterwards if you realize Babel was not yet installed):
    168 {{{#!sh
    169 $ python ./setup.py install
    170 }}}
    171 Alternatively, you can run `bdist_egg` and copy the .egg from `dist/` to the place of your choice, or you can create a Windows installer (`bdist_wininst`).
     109
     110`pip` is the modern Python package manager and is included in Python distributions. `pip` will automatically resolve the //required// dependencies (Jinja2 and setuptools) and download the latest packages from pypi.org.
     111
     112You can also install directly from a source package. You can obtain the source in a tar or zip from the [trac:TracDownload] page. After extracting the archive, change to the directory containing `setup.py` and run:
     113
     114{{{#!sh
     115$ pip install .
     116}}}
     117
     118`pip` supports numerous other install mechanisms. It can be passed the URL of an archive or other download location. Here are some examples:
     119
     120* Install the latest development version from a tar archive:
     121{{{#!sh
     122$ pip install https://download.edgewall.org/trac/Trac-latest-dev.tar.gz
     123}}}
     124* Install the unreleased 1.4-stable from subversion:
     125{{{#!sh
     126$ pip install svn+https://svn.edgewall.org/repos/trac/branches/1.4-stable
     127}}}
     128* Install the latest development preview (//not recommended for production installs//):
     129{{{#!sh
     130$ pip install --find-links=https://trac.edgewall.org/wiki/TracDownload Trac
     131}}}
     132
     133The optional dependencies can be installed from PyPI using `pip`:
     134{{{#!sh
     135$ pip install babel docutils pygments textile
     136}}}
     137
     138The optional dependencies can alternatively be
     139specified using the `extras` keys in the setup file:
     140{{{#!sh
     141$ pip install Trac[babel,rest,pygments,textile]
     142}}}
     143
     144`rest` is the extra that installs the `docutils`
     145dependency.
     146
     147Include `mysql` or `psycopg2-binary` in the
     148list if using the MySQL or PostgreSQL database.
     149
     150Additionally, you can install several Trac plugins from PyPI (listed [https://pypi.org/search/?c=Framework+%3A%3A+Trac here]) using pip. See TracPlugins for more information.
    172151
    173152=== Using installer
    … …  
    177156=== Using package manager
    178157
    179 Trac may be available in your platform's package repository. Note however, that the version provided by your package manager may not be the latest release.
    180 
    181 === Advanced `easy_install` Options
    182 
    183 To install Trac to a custom location, or find out about other advanced installation options, run:
    184 {{{#!sh
    185 $ easy_install --help
    186 }}}
    187 
    188 Also see [http://docs.python.org/2/install/index.html Installing Python Modules] for detailed information.
    189 
    190 Specifically, you might be interested in:
    191 {{{#!sh
    192 $ easy_install --prefix=/path/to/installdir
    193 }}}
    194 or, if installing Trac on a Mac OS X system:
    195 {{{#!sh
    196 $ easy_install --prefix=/usr/local --install-dir=/Library/Python/2.6/site-packages
    197 }}}
    198 
    199 {{{#!div style="border: 1pt dotted; margin: 1em"
    200 **Mac OS X Note:** On Mac OS X 10.6,  running `easy_install trac` will install into `/usr/local` and `/Library/Python/2.6/site-packages` by default.
    201 
    202 The `tracd` and `trac-admin` commands will be placed in `/usr/local/bin` and will install the Trac libraries and dependencies into `/Library/Python/2.6/site-packages`, which is Apple's preferred location for third-party Python application installations.
    203 }}}
     158Trac may be available in your platform's package repository. However, your package manager may not provide the latest release of Trac.
    204159
    205160== Creating a Project Environment
    … …  
    212167}}}
    213168
    214 You will be prompted for the information needed to create the environment: the name of the project and the [TracEnvironment#DatabaseConnectionStrings database connection string]. If you're not sure what to specify for any of these options, just press `<Enter>` to use the default value.
     169[TracAdmin trac-admin] will prompt you for the information it needs to create the environment: the name of the project and the [TracEnvironment#DatabaseConnectionStrings database connection string]. If you're not sure what to specify for any of these options, just press `<Enter>` to use the default value.
    215170
    216171Using the default database connection string will always work as long as you have SQLite installed. For the other [trac:DatabaseBackend database backends] you should plan ahead and already have a database ready to use at this point.
    217172
    218173Also note that the values you specify here can be changed later using TracAdmin or directly editing the [TracIni conf/trac.ini] configuration file.
    219 
    220 {{{#!div style="border: 1pt dotted; margin: 1em"
    221 **Filesystem Warning:** When selecting the location of your environment, make sure that the filesystem on which the environment directory resides supports sub-second timestamps (i.e. **not** `ext2` or `ext3` on Linux, or HFS+ on OSX), as the modification time of the `conf/trac.ini` file will be monitored to decide whether an environment restart is needed or not. A too coarse-grained timestamp resolution may result in inconsistencies in Trac < 1.0.2. The best advice is to opt for a platform with sub-second timestamp resolution, regardless of the Trac version.
    222 }}}
    223174
    224175Finally, make sure the user account under which the web front-end runs will have '''write permissions''' to the environment directory and all the files inside. This will be the case if you run `trac-admin ... initenv` as this user. If not, you should set the correct user afterwards. For example on Linux, with the web server running as user `apache` and group `apache`, enter:
    … …  
    235186== Deploying Trac
    236187
    237 {{{#!div style="border: 1pt dotted; margin: 1em"
    238 **Setuptools Warning:** If the version of your setuptools is in the range 5.4 through 5.6, the environment variable `PKG_RESOURCES_CACHE_ZIP_MANIFESTS` must be set in order to avoid significant performance degradation.
    239 
    240 If running `tracd`, the environment variable can be set system-wide or for just the user that runs the `tracd` process. There are several ways to accomplish this in addition to what is discussed here, and depending on the distribution of your OS.
    241 
    242 To be effective system-wide a shell script with the `export` statement may be added to `/etc/profile.d`. To be effective for a user session the `export` statement may be added to `~/.profile`.
    243 {{{#!sh
    244 export PKG_RESOURCES_CACHE_ZIP_MANIFESTS=1
    245 }}}
    246 
    247 Alternatively, the variable can be set in the shell before executing `tracd`:
    248 {{{#!sh
    249 $ PKG_RESOURCES_CACHE_ZIP_MANIFESTS=1 tracd --port 8000 /path/to/myproject
    250 }}}
    251 
    252 If running the Apache web server, !Ubuntu/Debian users should add the `export` statement to `/etc/apache2/envvars`. !RedHat/CentOS/Fedora should can add the `export` statement to `/etc/sysconfig/httpd`.
    253 }}}
    254 
    255188=== Running the Standalone Server
    256189
    … …  
    260193}}}
    261194
    262 Then, fire up a browser and visit `http://localhost:8000/`. You should get a simple listing of all environments that `tracd` knows about. Follow the link to the environment you just created, and you should see Trac in action. If you only plan on managing a single project with Trac you can have the standalone server skip the environment list by starting it like this:
     195Then, open a browser and visit `http://localhost:8000/`. You should get a simple listing of all environments that `tracd` knows about. Follow the link to the environment you just created, and you should see Trac in action. If you only plan on managing a single project with Trac you can have the standalone server skip the environment list by starting it like this:
    263196{{{#!sh
    264197$ tracd -s --port 8000 /path/to/myproject
    … …  
    267200=== Running Trac on a Web Server
    268201
    269 Trac provides various options for connecting to a "real" web server: 
     202Trac provides various options for connecting to a "real" web server:
    270203 - [TracFastCgi FastCGI]
    271  - [wiki:TracModWSGI Apache with mod_wsgi] 
     204 - [wiki:TracModWSGI Apache with mod_wsgi]
    272205 - [TracModPython Apache with mod_python]
    273206 - [TracCgi CGI] //(should not be used, as the performance is far from optimal)//
    274207
    275 Trac also supports [trac:TracOnWindowsIisAjp AJP] which may be your choice if you want to connect to IIS. Other deployment scenarios are possible: [trac:TracNginxRecipe nginx], [http://projects.unbit.it/uwsgi/wiki/Example#Traconapacheinasub-uri uwsgi], [trac:TracOnWindowsIisIsapi Isapi-wsgi] etc.
     208Trac also supports [trac:TracOnWindowsIisAjp AJP] which may be your choice if you want to connect to IIS. Other deployment scenarios are possible: [trac:TracNginxRecipe nginx], [https://uwsgi-docs.readthedocs.io/en/latest/#Traconapacheinasub-uri uwsgi], [trac:TracOnWindowsIisIsapi Isapi-wsgi] etc.
    276209
    277210==== Generating the Trac cgi-bin directory #cgi-bin
    … …  
    296229Without additional configuration, Trac will handle requests for static resources such as stylesheets and images. For anything other than a TracStandalone deployment, this is not optimal as the web server can be set up to directly serve the static resources. For CGI setup, this is '''highly undesirable''' as it causes abysmal performance.
    297230
    298 Web servers such as [http://httpd.apache.org/ Apache] allow you to create //Aliases// to resources, giving them a virtual URL that doesn't necessarily reflect their location on the file system. We can map requests for static resources directly to directories on the file system, to avoid Trac processing the requests.
     231Web servers such as [https://httpd.apache.org/ Apache] allow you to create //Aliases// to resources, giving them a virtual URL that doesn't necessarily reflect their location on the file system. We can map requests for static resources directly to directories on the file system, to avoid Trac processing the requests.
    299232
    300233There are two primary URL paths for static resources: `/chrome/common` and `/chrome/site`. Plugins can add their own resources, usually accessible at the `/chrome/<plugin>` path.
    … …  
    320253Assuming the deployment has been done this way:
    321254{{{#!sh
    322 $ trac-admin /var/trac/<project> deploy /var/www
     255$ trac-admin /var/trac/<project> deploy /var/www/trac
    323256}}}
    324257
    325258Add the following snippet to Apache configuration, changing paths to match your deployment. The snippet must be placed ''before'' the `ScriptAlias` or `WSGIScriptAlias` directive, because those directives map all requests to the Trac application:
    326259{{{#!apache
    327 Alias /trac/chrome /path/to/trac/htdocs
    328 
    329 <Directory "/path/to/www/trac/htdocs">
     260Alias /trac/chrome /var/www/trac/htdocs
     261
     262<Directory "/var/www/trac/htdocs">
    330263  # For Apache 2.2
    331264  <IfModule !mod_authz_core.c>
    … …  
    364297}}}
    365298
    366 Another alternative to aliasing `/trac/chrome/common` is having Trac generate direct links for those static resources (and only those), using the [TracIni#trac-section htdocs_location] configuration setting:
     299Another alternative to aliasing `/trac/chrome/common` is having Trac generate direct links for those static resources (and only those), using the [TracIni#trac-htdocs_location-option trac.htdocs_location] configuration setting:
    367300{{{#!ini
    368301[trac]
    … …  
    377310}}}
    378311
    379 ==== Setting up the Plugin Cache #egg-cache
     312==== Setting up the Plugin Cache
    380313
    381314Some Python plugins need to be extracted to a cache directory. By default the cache resides in the home directory of the current user. When running Trac on a Web Server as a dedicated user (which is highly recommended) who has no home directory, this might prevent the plugins from starting. To override the cache location you can set the `PYTHON_EGG_CACHE` environment variable. Refer to your server documentation for detailed instructions on how to set environment variables.
    382315
    383 If you setup hook scripts that call Trac, such as the Subversion post-commit hook script provided in the `/contrib` directory, make sure you define the `PYTHON_EGG_CACHE` environment variable within these scripts as well.
    384 
    385316== Configuring Authentication
    386317
    387 Trac uses HTTP authentication. You'll need to configure your webserver to request authentication when the `.../login` URL is hit (the virtual path of the "login" button). Trac will automatically pick the `REMOTE_USER` variable up after you provide your credentials. Therefore, all user management goes through your web server configuration. Please consult the documentation of your web server for more info.
    388 
    389 The process of adding, removing, and configuring user accounts for authentication depends on the specific way you run Trac. 
     318Trac uses HTTP authentication. You'll need to configure your web server to request authentication when the `.../login` URL is hit (the virtual path of the "login" button). Trac will automatically pick the `REMOTE_USER` variable up after you provide your credentials. Therefore, all user management goes through your web server configuration. Please consult the documentation of your web server for more info.
     319
     320The process of adding, removing, and configuring user accounts for authentication depends on the specific way you run Trac.
    390321
    391322Please refer to one of the following sections:
    … …  
    406337== Configuring Trac
    407338
     339Configuration options are documented on the TracIni page.
     340
    408341TracRepositoryAdmin provides information on configuring version control repositories for your project.
    409342
     343In addition to the optional version control backends, Trac provides several optional features that are disabled by default:
     344* [TracFineGrainedPermissions#AuthzPolicy Fine-grained permission policy]
     345* [TracPermissions#CreatingNewPrivileges Custom permissions]
     346* [TracTickets#deleter Ticket deletion]
     347* [TracTickets#cloner Ticket cloning]
     348* [TracRepositoryAdmin#CommitTicketUpdater Ticket changeset references]
     349
    410350== Using Trac
    411351
    … …  
    419359
    420360----
    421 See also: [trac:TracInstallPlatforms TracInstallPlatforms], TracGuide, TracUpgrade, TracPermissions
     361See also: [trac:TracInstallPlatforms TracInstallPlatforms], TracGuide, TracUpgrade