echo "### You can start fess service by executing"
        echo " sudo /etc/init.d/fess start"
    fi
elif [ "$RESTART_ON_UPGRADE" = "true" ]; then

    echo -n "Restarting fess service..."
    if command -v systemctl >/dev/null; then
        systemctl daemon-reload
        systemctl restart fess.service || true

    elif [ -x /etc/init.d/fess ]; then
        if command -v invoke-rc.d >/dev/null; then

        assertEquals("fess.log", AdminLogAction.sanitizeFilename("fess .log"));
        assertEquals("fess.log", AdminLogAction.sanitizeFilename(" fess.log"));
        assertEquals("fess.log", AdminLogAction.sanitizeFilename("fess.log "));
        assertEquals("fess.log", AdminLogAction.sanitizeFilename(" fess.log "));
        assertEquals("fess.log", AdminLogAction.sanitizeFilename("fess\t.log"));

<a href="fess-ds-box/" title="fess-ds-box/">fess-ds-box/</a>                                                     -         -      
<a href="fess-ds-csv/" title="fess-ds-csv/">fess-ds-csv/</a>                                                     -         -      

  <display-name>JSTL functions</display-name>
  <tlib-version>1.1</tlib-version>
  <short-name>fe</short-name>
  <uri>fess.tags.functions</uri>
  
  <function>
    <description>
      Print HTML tag.
    </description>
    <name>html</name>
    <function-class>org.codelibs.fess.taglib.FessFunctions</function-class>
    <function-signature>java.lang.String html(boolean)</function-signature>
    <example>

		<packaging.fess.log.dir>/var/log/fess</packaging.fess.log.dir>
		<packaging.fess.temp.dir>/var/tmp/fess</packaging.fess.temp.dir>
		<packaging.fess.extension.dir>${packaging.fess.home.dir}/extension</packaging.fess.extension.dir>
		<packaging.fess.user>fess</packaging.fess.user>
		<packaging.fess.group>fess</packaging.fess.group>
		<packaging.fess.pid.dir>/var/run/fess</packaging.fess.pid.dir>

        assertEquals("fess-ingest", ArtifactType.INGEST.getId());
        assertEquals("fess-script", ArtifactType.SCRIPT.getId());
        assertEquals("fess-webapp", ArtifactType.WEBAPP.getId());
        assertEquals("fess-thumbnail", ArtifactType.THUMBNAIL.getId());
        assertEquals("fess-crawler", ArtifactType.CRAWLER.getId());
        assertEquals("jar", ArtifactType.UNKNOWN.getId());
    }

			<includes>
				<include>FessBoot**</include>
				<include>tomcat/**</include>
			</includes>
			<outputDirectory>fess-${project.version}/lib/classes/org/codelibs/fess</outputDirectory>
		</fileSet>
		<fileSet>
			<directory>${project.basedir}/src/main/assemblies/files</directory>
			<includes>
				<include>logging.properties</include>
				<include>tomcat_config.properties</include>
			</includes>

			<arg>"fess"</arg>
			<arg>"ru/stemmer_override.txt"</arg>
		</postConstruct>
		<postConstruct name="addConfigFile">
			<arg>"fess"</arg>
			<arg>"sv/stemmer_override.txt"</arg>
		</postConstruct>
		<postConstruct name="addConfigFile">
			<arg>"fess"</arg>
			<arg>"tr/stemmer_override.txt"</arg>
		</postConstruct>
		<!-- fess index -->
		<postConstruct name="addIndexConfig">
			<arg>"fess/doc"</arg>
		</postConstruct>

	"http://dbflute.org/meta/lastadi10.dtd">
<components>
	<component name="queryFieldConfig"
		class="org.codelibs.fess.query.QueryFieldConfig">
	</component>

	<component name="queryProcessor"
		class="org.codelibs.fess.query.QueryProcessor">
	</component>

	<component name="booleanQueryCommand"
		class="org.codelibs.fess.query.BooleanQueryCommand">
		<postConstruct name="register"></postConstruct>
	</component>

Fess 基于 [OpenSearch](https://github.com/opensearch-project/OpenSearch)，但不需要 OpenSearch 的知识或经验。Fess 提供了一个易于使用的管理 GUI，您可以通过浏览器配置系统。Fess 还包含一个爬虫，能够抓取 [Web 服务器](https://fess.codelibs.org/15.3/admin/webconfig-guide.html)、[文件系统](https://fess.codelibs.org/15.3/admin/fileconfig-guide.html)或[数据存储](https://fess.codelibs.org/15.3/admin/dataconfig-guide.html)（如 CSV 或数据库）中的文档。Fess 支持多种文件格式，包括但不限于：Microsoft Office、PDF 和 zip。