fluent · Watson1978 · Dec 19, 2025 · Dec 19, 2025
diff --git a/SUMMARY.md b/SUMMARY.md
@@ -23,6 +23,10 @@
   * [Install from Source](installation/install-from-source.md)
   * [Post Installation Guide](installation/post-installation-guide.md)
   * Obsolete Installation
+    * Fluent Package v5 (EOL) Installation
+      * [Install by RPM Package v5 \(Red Hat Linux\)](installation/install-fluent-package/install-by-rpm-fluent-package-v5.md)
+      * [Install by DEB Package v5 \(Debian/Ubuntu\)](installation/install-fluent-package/install-by-deb-fluent-package-v5.md)
+      * [Install by .msi Installer v5 \(Windows\)](installation/install-fluent-package/install-by-msi-fluent-package-v5.md)
     * Treasure Agent v4 (EOL) Installation
       * [Install by RPM Package v4 \(Red Hat Linux\)](installation/install-by-rpm-td-agent-v4.md)
       * [Install by DEB Package v4 \(Debian/Ubuntu\)](installation/install-by-deb-td-agent-v4.md)

diff --git a/installation/install-fluent-package/install-by-deb-fluent-package-v5.md b/installation/install-fluent-package/install-by-deb-fluent-package-v5.md
@@ -0,0 +1,175 @@
+# Install `fluent-package` by DEB Package \(Debian/Ubuntu\)
+
+This article explains how to install stable versions of `fluent-package` deb packages, the stable Fluentd distribution packages maintained by [Fluentd Project](https://www.fluentd.org/).
+
+## What is `fluent-package`?
+
+Please see [fluent-package-v5-vs-td-agent](../../quickstart/fluent-package-v5-vs-td-agent.md).
+
+## How to install `fluent-package`
+
+{% hint style='info' %}
+NOTE:
+
+* `fluent-package` will be shipped in two flavors - normal release version and LTS (Long Term Support) version. See [Scheduled support lifecycle announcement about Fluent Package v6](https://www.fluentd.org/blog/fluent-package-v6-scheduled-lifecycle) about difference between this two flavors.
+* If you upgrade from `td-agent` v4, See [Upgrade to fluent-package v5](https://www.fluentd.org/blog/upgrade-td-agent-v4-to-v5).
+* Do not directly upgrade from v3 to v5. Such a workflow is not supported. It causes a trouble. Upgrade in stages. (v3 to v4, then v4 to v5)
+{% endhint %}
+
+{% hint style='danger' %}
+The following are deprecated fluent-package and td-agent (EOL) information:
+
+* About [Treasure Agent (td-agent) v4 (EOL)](https://www.fluentd.org/blog/schedule-for-td-agent-4-eol), See [Install by DEB Package v4](../install-by-deb-td-agent-v4.md).
+* About [Treasure Agent (td-agent) 3 will not be maintained anymore](https://www.fluentd.org/blog/schedule-for-td-agent-3-eol), see [Install by DEB Package  v3](../install-by-deb-td-agent-v3.md).
+{% endhint %}
+
+### Step 0: Before Installation
+
+Please follow the [Pre-installation Guide](../before-install.md) to configure your OS properly.
+
+### Step 1: Install from Apt Repository
+
+NOTE: If your OS is not supported, consider [gem installation](../install-by-gem.md) instead.
+
+A shell script is provided to automate the installation process for each version. The shell script registers a new apt repository at `/etc/apt/sources.list.d/fluent.sources` (or `/etc/apt/sources.list.d/fluent-lts.sources`) and installs the `fluent-package` deb package.
+
+#### For Ubuntu Noble:
+
+##### fluent-package 5 (LTS)
+
+```bash
+curl -fsSL https://fluentd.cdn.cncf.io/sh/install-ubuntu-noble-fluent-package5-lts.sh | sh
+```
+
+##### fluent-package 5
+
+```bash
+curl -fsSL https://fluentd.cdn.cncf.io/sh/install-ubuntu-noble-fluent-package5.sh | sh
+```
+
+#### For Ubuntu Jammy:
+
+##### fluent-package 5 (LTS)
+
+```bash
+curl -fsSL https://fluentd.cdn.cncf.io/sh/install-ubuntu-jammy-fluent-package5-lts.sh | sh
+```
+
+##### fluent-package 5
+
+```bash
+curl -fsSL https://fluentd.cdn.cncf.io/sh/install-ubuntu-jammy-fluent-package5.sh | sh
+```
+
+#### For Ubuntu Focal:
+
+{% hint style='info' %}
+fluent-package v6 will not be shipped for Ubuntu Focal.
+{% endhint %}
+
+##### fluent-package 5 (LTS)
+
+```bash
+curl -fsSL https://fluentd.cdn.cncf.io/sh/install-ubuntu-focal-fluent-package5-lts.sh | sh
+```
+
+##### fluent-package 5
+
+```bash
+curl -fsSL https://fluentd.cdn.cncf.io/sh/install-ubuntu-focal-fluent-package5.sh | sh
+```
+
+#### For Debian Bookworm:
+
+##### fluent-package 5 (LTS)
+
+```bash
+curl -fsSL https://fluentd.cdn.cncf.io/sh/install-debian-bookworm-fluent-package5-lts.sh | sh
+```
+
+##### fluent-package 5
+
+```bash
+curl -fsSL https://fluentd.cdn.cncf.io/sh/install-debian-bookworm-fluent-package5.sh | sh
+```
+
+#### For Debian Bullseye:
+
+{% hint style='info' %}
+fluent-package v6 will not be shipped for Debian Bullseye.
+{% endhint %}
+
+##### fluent-package 5 (LTS)
+
+```bash
+curl -fsSL https://fluentd.cdn.cncf.io/sh/install-debian-bullseye-fluent-package5-lts.sh | sh
+```
+
+##### fluent-package 5
+
+```bash
+curl -fsSL https://fluentd.cdn.cncf.io/sh/install-debian-bullseye-fluent-package5.sh | sh
+```
+
+### Step 2: Launch Daemon
+
+### `systemd`
+
+Use `/lib/systemd/system/fluentd` script to `start`, `stop`, or `restart` the agent:
+
+```text
+$ sudo systemctl start fluentd.service
+$ sudo systemctl status fluentd.service
+ sudo systemctl status fluentd
+● fluentd.service - fluentd: All in one package of Fluentd
+     Loaded: loaded (/lib/systemd/system/fluentd.service; enabled; vendor preset: enabled)
+     Active: active (running) since Wed 2023-08-16 08:18:22 UTC; 18s ago
+       Docs: https://docs.fluentd.org/
+    Process: 494 ExecStart=/opt/fluent/bin/fluentd --log $FLUENT_PACKAGE_LOG_FILE --daemon /var/run/fluent/fluentd.pid $FLUENT_PACKAGE_OPTI>
+   Main PID: 826 (fluentd)
+      Tasks: 9 (limit: 4660)
+     Memory: 95.4M
+        CPU: 731ms
+     CGroup: /system.slice/fluentd.service
+             ├─826 /opt/fluent/bin/ruby /opt/fluent/bin/fluentd --log /var/log/fluent/fluentd.log --daemon /var/run/fluent/fluentd.pid
+             └─833 /opt/fluent/bin/ruby -Eascii-8bit:ascii-8bit /opt/fluent/bin/fluentd --log /var/log/fluent/fluentd.log --daemon /var/run>
+```
+
+To customize `systemd` behavior, put your `fluentd.service` in `/etc/systemd/system`.
+
+NOTE: In fluent-package v5, path is different. `/opt/fluent/bin` instead of `/opt/td-agent/bin`
+
+### Step 3: Post Sample Logs via HTTP
+
+The default configuration \(`/etc/fluent/fluentd.conf`\) is to receive logs at an HTTP endpoint and route them to `stdout`. For `fluent-package` logs, see `/var/log/fluent/fluentd.log`.
+
+You can post sample log records with `curl` command:
+
+```text
+$ curl -X POST -d 'json={"json":"message"}' http://localhost:8888/debug.test
+$ tail -n 1 /var/log/fluent/fluentd.log
+2018-01-01 17:51:47 -0700 debug.test: {"json":"message"}
+```
+
+## Next Steps
+
+You are now ready to collect real logs with Fluentd. Refer to the following tutorials on how to collect data from various sources:
+
+* Basic Configuration
+  * [Config File](../../configuration/config-file.md)
+* Application Logs
+  * [Ruby](../../language-bindings/ruby.md), [Java](../../language-bindings/java.md), [Python](../../language-bindings/python.md), [PHP](../../language-bindings/php.md),
+
+    [Perl](../../language-bindings/perl.md), [Node.js](../../language-bindings/nodejs.md), [Scala](../../language-bindings/scala.md)
+* Examples
+  * [Store Apache Log into Amazon S3](../../how-to-guides/apache-to-s3.md)
+  * [Store Apache Log into MongoDB](../../how-to-guides/apache-to-mongodb.md)
+  * [Data Collection into HDFS](../../how-to-guides/http-to-hdfs.md)
+
+{% hint style='info' %}
+There are some commercial supports for Fluentd, see [Enterprise Services](https://www.fluentd.org/enterprise_services).
+If you use Fluentd on production, Let's share your use-case/testimonial on [Testimonials](https://www.fluentd.org/testimonials) page.
+Please consider to feedback via [GitHub](https://github.com/fluent/fluentd-website/issues/new?template=testimonials.yml).
+{% endhint %}
+
+If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](http://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under the Apache 2 License.
diff --git a/installation/install-fluent-package/install-by-deb-fluent-package.md b/installation/install-fluent-package/install-by-deb-fluent-package.md
@@ -13,12 +13,13 @@ NOTE:
 
 * `fluent-package` will be shipped in two flavors - normal release version and LTS (Long Term Support) version. See [Scheduled support lifecycle announcement about Fluent Package v6](https://www.fluentd.org/blog/fluent-package-v6-scheduled-lifecycle) about difference between this two flavors.
 * If you upgrade from `td-agent` v4, See [Upgrade to fluent-package v5](https://www.fluentd.org/blog/upgrade-td-agent-v4-to-v5).
-* Do not directly upgrade from v3 to v5. Such a workflow is not supported. It causes a trouble. Upgrade in stages. (v3 to v4, then v4 to v5)
+* Do not directly upgrade from v4 to v6. Such a workflow is not supported. It causes a trouble. Upgrade in stages. (v4 to v5, then v5 to v6)
 {% endhint %}
 
 {% hint style='danger' %}
-The following are deprecated td-agent (EOL) information:
+The following are deprecated (EOL) fluent-package and td-agent information:
 
+* About [Fluent Package (fluent-package) v5 (EOL)](https://www.fluentd.org/blog/schedule-for-fluent-package-5-eol), See [Install by DEB Package v5](./install-by-deb-fluent-package-v5.md).
 * About [Treasure Agent (td-agent) v4 (EOL)](https://www.fluentd.org/blog/schedule-for-td-agent-4-eol), See [Install by DEB Package v4](../install-by-deb-td-agent-v4.md).
 * About [Treasure Agent (td-agent) 3 will not be maintained anymore](https://www.fluentd.org/blog/schedule-for-td-agent-3-eol), see [Install by DEB Package  v3](../install-by-deb-td-agent-v3.md).
 {% endhint %}
@@ -47,18 +48,6 @@ curl -fsSL https://fluentd.cdn.cncf.io/sh/install-ubuntu-noble-fluent-package6-l
 curl -fsSL https://fluentd.cdn.cncf.io/sh/install-ubuntu-noble-fluent-package6.sh | sh
 ```
 
-##### fluent-package 5 (LTS)
-
-```bash
-curl -fsSL https://fluentd.cdn.cncf.io/sh/install-ubuntu-noble-fluent-package5-lts.sh | sh
-```
-
-##### fluent-package 5
-
-```bash
-curl -fsSL https://fluentd.cdn.cncf.io/sh/install-ubuntu-noble-fluent-package5.sh | sh
-```
-
 #### For Ubuntu Jammy:
 
 ##### fluent-package 6 (LTS)
@@ -73,36 +62,6 @@ curl -fsSL https://fluentd.cdn.cncf.io/sh/install-ubuntu-jammy-fluent-package6-l
 curl -fsSL https://fluentd.cdn.cncf.io/sh/install-ubuntu-jammy-fluent-package6.sh | sh
 ```
 
-##### fluent-package 5 (LTS)
-
-```bash
-curl -fsSL https://fluentd.cdn.cncf.io/sh/install-ubuntu-jammy-fluent-package5-lts.sh | sh
-```
-
-##### fluent-package 5
-
-```bash
-curl -fsSL https://fluentd.cdn.cncf.io/sh/install-ubuntu-jammy-fluent-package5.sh | sh
-```
-
-#### For Ubuntu Focal:
-
-{% hint style='info' %}
-fluent-package v6 will not be shipped for Ubuntu Focal.
-{% endhint %}
-
-##### fluent-package 5 (LTS)
-
-```bash
-curl -fsSL https://fluentd.cdn.cncf.io/sh/install-ubuntu-focal-fluent-package5-lts.sh | sh
-```
-
-##### fluent-package 5
-
-```bash
-curl -fsSL https://fluentd.cdn.cncf.io/sh/install-ubuntu-focal-fluent-package5.sh | sh
-```
-
 #### For Debian Trixie:
 
 ##### fluent-package 6
@@ -131,36 +90,6 @@ curl -fsSL https://fluentd.cdn.cncf.io/sh/install-debian-bookworm-fluent-package
 curl -fsSL https://fluentd.cdn.cncf.io/sh/install-debian-bookworm-fluent-package6.sh | sh
 ```
 
-##### fluent-package 5 (LTS)
-
-```bash
-curl -fsSL https://fluentd.cdn.cncf.io/sh/install-debian-bookworm-fluent-package5-lts.sh | sh
-```
-
-##### fluent-package 5
-
-```bash
-curl -fsSL https://fluentd.cdn.cncf.io/sh/install-debian-bookworm-fluent-package5.sh | sh
-```
-
-#### For Debian Bullseye:
-
-{% hint style='info' %}
-fluent-package v6 will not be shipped for Debian Bullseye.
-{% endhint %}
-
-##### fluent-package 5 (LTS)
-
-```bash
-curl -fsSL https://fluentd.cdn.cncf.io/sh/install-debian-bullseye-fluent-package5-lts.sh | sh
-```
-
-##### fluent-package 5
-
-```bash
-curl -fsSL https://fluentd.cdn.cncf.io/sh/install-debian-bullseye-fluent-package5.sh | sh
-```
-
 ### Step 2: Launch Daemon
 
 ### `systemd`