Merge pull request #1549 from fluent/lynettemiles/sc-105724/update-installation-linux-redhat-centos-md

Updating Centos install page for grammar and style

Author: esmerel

installation/linux/redhat-centos.md

@@ -1,60 +1,68 @@
-# Redhat / CentOS
+# Red Hat and CentOS
 
-## Install on Redhat / CentOS
+Fluent Bit is distributed as the `fluent-bit` package and is available for the latest
+stable CentOS system.
 
-Fluent Bit is distributed as **fluent-bit** package and is available for the latest stable CentOS system.
+Fluent Bit supports the following architectures:
 
-The following architectures are supported
+- `x86_64`
+- `aarch64`
+- `arm64v8`
 
-* x86\_64
-* aarch64 / arm64v8
-
-For CentOS 9+ we use CentOS Stream as the canonical base system.
+For CentOS 9 and later, Fluent Bit uses [CentOS Stream](https://www.centos.org/centos-stream/)
+as the canonical base system.
 
 ## Single line install
 
-A simple installation script is provided to be used for most Linux targets.
-This will always install the most recent version released.
+Fluent Bit provides an installation script to use for most Linux targets.
+This will always install the most recently released version.
 
 ```bash
 curl https://raw.githubusercontent.com/fluent/fluent-bit/master/install.sh | sh
 ```
 
-This is purely a convenience helper and should always be validated prior to use.
-The recommended secure deployment approach is to follow the instructions below.
+This is a convenience helper and should always be validated prior to use.
+The recommended secure deployment approach is to use the following instructions:
 
 ## CentOS 8
 
-CentOS 8 is now EOL so the default Yum repositories are unavailable.
+CentOS 8 is now end-of-life, so the default Yum repositories are unavailable.
 
-Make sure to configure to use an appropriate mirror, for example:
+Ensure you've configured an appropriate mirror. For example:
 
 ```shell
-$ sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-* && \
-  sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*
+sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-* && \
+sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*
 ```
 
-An alternative is to use Rocky or Alma Linux which _should_ be equivalent.
+An alternative is to use Rocky or Alma Linux, which should be equivalent.
 
 ## Configure Yum
 
-We provide **fluent-bit** through a Yum repository. In order to add the repository reference to your system, please add a new file called _fluent-bit.repo_ in _/etc/yum.repos.d/_ with the following content:
+The `fluent-bit` is provided through a Yum repository. To add the repository
+reference to your system:
 
-```shell
-[fluent-bit]
-name = Fluent Bit
-baseurl = https://packages.fluentbit.io/centos/$releasever/
-gpgcheck=1
-gpgkey=https://packages.fluentbit.io/fluentbit.key
-repo_gpgcheck=1
-enabled=1
-```
+1. In `/etc/yum.repos.d/`, add a new file called `fluent-bit.repo`.
+1. Add the following content to the file:
 
-It is best practice to always enable the _gpgcheck_ and _repo\_gpgcheck_ for security reasons. We sign our repository metadata as well as all of our packages.
+   ```text
+   [fluent-bit]
+   name = Fluent Bit
+   baseurl = https://packages.fluentbit.io/centos/$releasever/
+   gpgcheck=1
+   gpgkey=https://packages.fluentbit.io/fluentbit.key
+   repo_gpgcheck=1
+   enabled=1
+   ```
+
+1. As a best practice, enable `gpgcheck` and `repo_gpgcheck` for security reasons.
+   Fluent Bit signs its repository metadata and all Fluent Bit packages.
 
 ### Updated key from March 2022
 
-From the 1.9.0 and 1.8.15 releases please note that the GPG key has been updated at [https://packages.fluentbit.io/fluentbit.key](https://packages.fluentbit.io/fluentbit.key) so ensure this new one is added.
+For the 1.9.0 and 1.8.15 and later releases, the
+[GPG key has been updated](https://packages.fluentbit.io/fluentbit.key). Ensure
+this new one is added.
 
 The GPG Key fingerprint of the new key is:
 
@@ -63,29 +71,31 @@ C3C0 A285 34B9 293E AF51  FABD 9F9D DC08 3888 C1CD
 Fluentbit releases (Releases signing key) <[email protected]>
 ```
 
-The previous key is still available at [https://packages.fluentbit.io/fluentbit-legacy.key](https://packages.fluentbit.io/fluentbit-legacy.key) and may be required to install previous versions.
+The previous key is [still available](https://packages.fluentbit.io/fluentbit-legacy.key)
+and might be required to install previous versions.
 
 The GPG Key fingerprint of the old key is:
 
 ```text
 F209 D876 2A60 CD49 E680 633B 4FF8 368B 6EA0 722A
 ```
 
-Refer to the [supported platform documentation](../supported-platforms.md) to see which platforms are supported in each release.
+Refer to the [supported platform documentation](../supported-platforms.md) to see
+which platforms are supported in each release.
 
 ### Install
 
-Once your repository is configured, run the following command to install it:
+1. After your repository is configured, run the following command to install it:
 
-```bash
-sudo yum install fluent-bit
-```
+   ```bash
+   sudo yum install fluent-bit
+   ```
 
-Now the following step is to instruct _Systemd_ to enable the service:
+1. Instruct `Systemd` to enable the service:
 
-```bash
-sudo systemctl start fluent-bit
-```
+   ```bash
+   sudo systemctl start fluent-bit
+   ```
 
 If you do a status check, you should see a similar output like this:
 
@@ -100,13 +110,17 @@ $ systemctl status fluent-bit
 ...
 ```
 
-The default configuration of **fluent-bit** is collecting metrics of CPU usage and sending the records to the standard output, you can see the outgoing data in your _/var/log/messages_ file.
+The default Fluent Bit configuration collect metrics of CPU usage and sends the
+records to the standard output. You can see the outgoing data in your
+`/var/log/messages` file.
 
 ## FAQ
 
 ### Yum install fails with a "404 - Page not found" error for the package mirror
 
-The fluent-bit.repo file for the latest installations of Fluent-Bit uses a $releasever variable to determine the correct version of the package to install to your system:
+The `fluent-bit.repo` file for the latest installations of Fluent Bit uses a
+`$releasever` variable to determine the correct version of the package to install to
+your system:
 
 ```text
 [fluent-bit]
@@ -115,9 +129,13 @@ baseurl = https://packages.fluentbit.io/centos/$releasever/$basearch/
 ...
 ```
 
-Depending on your Red Hat distribution version, this variable may return a value other than the OS major release version (e.g., RHEL7 Server distributions return "7Server" instead of just "7"). The Fluent-Bit package url uses just the major OS release version, so any other value here will cause a 404.
+Depending on your Red Hat distribution version, this variable can return a value
+other than the OS major release version (for example, RHEL7 Server distributions return
+`7Server` instead of `7`). The Fluent Bit package URL uses the major OS
+release version, so any other value here will cause a 404.
 
-In order to resolve this issue, you can replace the $releasever variable with your system's OS major release version. For example:
+To resolve this issue, replace the `$releasever` variable with your system's OS major
+release version. For example:
 
 ```text
 [fluent-bit]