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[#]: subject: "How to Install PgAdmin4 on RHEL 9 Step by Step"
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[#]: via: "https://www.linuxtechi.com/how-to-install-pgadmin-on-rhel/"
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[#]: author: "Pradeep Kumar https://www.linuxtechi.com/author/pradeep/"
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[#]: collector: "lkxed"
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[#]: translator: "geekpi"
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[#]: reviewer: " "
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[#]: publisher: " "
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[#]: url: " "
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How to Install PgAdmin4 on RHEL 9 Step by Step
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======
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Pgadmin4is a free and opensource web-based administration and development platform for PostgreSQL. It interacts with PostgreSQL database server on both local and remote servers and displays server statistics using intuitive and interactive dashboards.
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Pgadmin4 is a rewrite of Pgadmin 3 and provides the following notable features:
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- A responsive web UI with intutive and real-time monitoring dashboards
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- An improved web interface with cool and new panels and icons.
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- An SQL query editor with syntax highlighting.
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- Extensive documentation.
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- Useful tips to help you get started.
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In this guide, we will demonstrate how to install Pgadmin4 on RHEL 9.
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##### Prerequisites
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Before you begin, ensure that you have a RHEL 9 server instance with PostgreSQL database server installed. Check out guide on how to install PostgreSQL 15 on RHEL 9.
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With PostgreSQL server installed, carry on with the following steps.
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### Step 1) Add Pgadmin4 Repository on RHEL 9
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The first step is to add the Pgadmin4 repository on RHEL 9. But first, install the EPEL repository which provides essential software packages.
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```
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$ sudo dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-9.noarch.rpm
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```
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Next, install Pgadmin4’s repository as follows.
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```
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$ sudo dnf install -y https://ftp.postgresql.org/pub/pgadmin/pgadmin4/yum/pgadmin4-redhat-repo-2-1.noarch.rpm
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```
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Once done, build a cache for Pgadmin4 and EPEL repositories as follows.
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```
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$ sudo dnf makecache
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```
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### Step 2) Install PgAdmin4 on RHEL 9
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Once the Pgadmin4 and EPEL repositories are in place, proceed and install Pgadmin4 using the DNF package manager as shown.
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```
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$ sudo dnf install pgadmin4 -y
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```
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This installs a myriad of packages including Pgadmin4, Apache HTTP web servers, and Python packages to mention a few.
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To confirm that Pgadmin4 has been installed, run the following command:
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```
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$ rpm -qi pgadmin4
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```
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This prints out quite some information including the name, version, release, and architecture of the installed package.
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### Step 3) Start / Enable PgAdmin4 on RHEL 9
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At this point, Pgadmin4 is successfully installed. However, you need to go a step further and get it running. To start the Pgadmin4 service, run the command:
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```
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$ sudo systemctl start httpd
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```
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Be sure also to enable the service to start every time the system boots.
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```
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$ sudo systemctl enable httpd
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```
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To confirm that Pgadmin4 is running run the command:
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```
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$ sudo systemctl status httpd
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```
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### Step 4) Initializing PgAdmin4 on RHEL 9
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The Pgadmin4 package provides a configurable script for setting up the pgAdmin web service. This allows you to create a user account which is used to authenticate and configure SELinux policies and Apache web server.
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Therefore, run the script as follows.
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```
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$ sudo /usr/pgadmin4/bin/setup-web.sh
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```
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Provide the email and password that you will use as login credentials on the login page.
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NOTE:Sometimes, you may encounter a ‘semanage: command not found‘ error as shown in the output below. This indicates that the semanage package is missing.
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Semanage, short for SELinux (Security-Enhanced Linux) policy management tool, is a utility used to configure some aspects of SELinux policy without requiring modification to or recompilation from policy sources.
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To fix this error, you need to check for the package that provides semanage. You can do this by running the command:
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```
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$ sudo dnf provides /usr/sbin/semanage
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```
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From the output, you can see that semanage is provided by the policycoreutils-python-utils-3.3-6.el9_0.noarch package.
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To install this package, run the following command.
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```
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$ sudo dnf install policycoreutils-python-utils -y
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```
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Once again, run the Pgadmn4 installation script as shown. Provide the email address and password and type ‘y’ when prompted.
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```
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$ sudo /usr/pgadmin4/bin/setup-web.sh
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```
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### Step 5) Access the Pgadmin4 Web Interface
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At this point, Pgadmin4 is successfully installed. To access it from a web browser, head over to the following address:
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http://server-ip/pgadmin4
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You will get the following login web interface. Be sure to provide the Email and password you provided when running the installation script and click ‘Login’.
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Once logged in, the Pgadmin4 dashboard will come to view as shown.
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To add a server that can be administered by Pgadmin4, click ‘Add New Server’
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On the ‘General’ tab fill out the name of the server and add comments for better description.
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Next, click ‘Connection’ and fill out the Hostname/Address , Port , maintenance database , username and password. Then finally click ‘Save’.
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Thereafter, you will see PosrgreSQL server statistics displayed on interactive and intuitive dashboards. On the left sidebar, you can browse various PostgreSQL parameters.
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##### Conclusion
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We hope you found this guide informative, kindly do post your queries and feedback in below comments section.
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--------------------------------------------------------------------------------
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via: https://www.linuxtechi.com/how-to-install-pgadmin-on-rhel/
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作者：[Pradeep Kumar][a]
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选题：[lkxed][b]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://www.linuxtechi.com/author/pradeep/
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[b]: https://github.com/lkxed/
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@ -0,0 +1,195 @@
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[#]: subject: "How to Install PgAdmin4 on RHEL 9 Step by Step"
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[#]: via: "https://www.linuxtechi.com/how-to-install-pgadmin-on-rhel/"
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[#]: author: "Pradeep Kumar https://www.linuxtechi.com/author/pradeep/"
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[#]: collector: "lkxed"
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[#]: translator: "geekpi"
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[#]: reviewer: " "
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[#]: publisher: " "
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[#]: url: " "
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如何在 RHEL 9 上分步安装 PgAdmin4
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======
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Pgadmin4 是一个免费和开源的基于网络的 PostgreSQL 管理和开发平台。它与本地和远程服务器上的 PostgreSQL 数据库服务器进行交互，并使用直观和交互式的仪表板显示服务器的统计数据。
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Pgadmin4 是对 Pgadmin3 的重写，提供了以下显著的特点：
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- 一个具有直观和实时监控仪表盘的响应式 Web UI。
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- 一个改进的 Web 界面，具有很酷的新面板和图标。
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- 带有语法高亮的 SQL 查询编辑器。
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- 全面的文档。
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- 帮助你入门的有用提示。
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在本指南中，我们将演示如何在 RHEL 9 上安装 Pgadmin4。
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##### 先决条件
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在开始之前，确保你有一台 RHEL 9 服务器实例并安装了 PostgreSQL 数据库。请查看如何在 RHEL 9 上安装 PostgreSQL 15 的指南。
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在安装了 PostgreSQL 服务器后，继续执行以下步骤。
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### 步骤 1）在 RHEL 9 上添加 Pgadmin4 仓库
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第一步是在 RHEL 9 上添加 Pgadmin4 仓库。但首先要安装 EPEL 仓库，它提供了基本的软件包。
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```
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$ sudo dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-9.noarch.rpm
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```
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接下来，安装 Pgadmin4 仓库，如下所示。
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```
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$ sudo dnf install -y https://ftp.postgresql.org/pub/pgadmin/pgadmin4/yum/pgadmin4-redhat-repo-2-1.noarch.rpm
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```
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完成后，为 Pgadmin4 和 EPEL 仓库建立一个缓存，如下所示。
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```
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$ sudo dnf makecache
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```
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### 步骤 2）在 RHEL 9 上安装 PgAdmin4
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安装好 Pgadmin4 和 EPEL 仓库后，继续使用 DNF 包管理器安装 Pgadmin4，如下所示。
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```
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$ sudo dnf install pgadmin4 -y
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```
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这将安装许多软件包，包括 Pgadmin4、Apache HTTP web 服务器和 Python 软件包，仅举几例。
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![][1]
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要确认 Pgadmin4 是否已经安装，请运行以下命令：
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```
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$ rpm -qi pgadmin4
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```
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这将打印出相当多的信息，包括已安装软件包的名称、版本、发行和架构。
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![][2]
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### 步骤 3) 在 RHEL 9 上启动/启用 PgAdmin4
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此时，Pgadmin4 已成功安装。然而，你需要更进一步，让它运行起来。要启动 Pgadmin4 服务，请运行以下命令：
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```
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$ sudo systemctl start httpd
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```
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还要确保每次系统启动时都能启动该服务。
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```
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$ sudo systemctl enable httpd
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```
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要确认 Pgadmin4 正在运行，请执行以下命令：
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```
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$ sudo systemctl status httpd
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```
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![][3]
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### 步骤 4）在 RHEL 9 上初始化 PgAdmin4
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Pgadmin4 软件包提供了一个可配置的脚本来设置 pgAdmin 网络服务。这允许你创建一个用户账户，用来验证和配置 SELinux 策略和 Apache Web 服务器。
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因此，如下运行该脚本。
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```
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$ sudo /usr/pgadmin4/bin/setup-web.sh
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```
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提供你将在登录页面上作为登录凭证使用的电子邮件和密码。
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注意:有时，你可能会遇到如下 “semanage: command not found” 的错误。这表明缺少 semanage 包。
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![][4]
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Semanage 是 SELinux（安全增强型 Linux）策略管理工具的简称，是一个用于配置 SELinux 策略某些方面的工具，不需要对策略源进行修改或重新编译。
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为了解决这个错误，你需要检查提供 semanage 的软件包。你可以通过运行以下命令来完成：
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```
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$ sudo dnf provides /usr/sbin/semanage
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```
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从输出中，你可以看到 semanage 是由 policycoreutils-python-utils-3.3-6.el9_0.noarch 包提供的。
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![][5]
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要安装这个软件包，请运行以下命令。
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```
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$ sudo dnf install policycoreutils-python-utils -y
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```
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再一次如下运行 Pgadmn4 安装脚本。 提供电子邮件地址和密码，在提示时输入 “y”。
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```
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$ sudo /usr/pgadmin4/bin/setup-web.sh
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```
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![][6]
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### 步骤 5) 访问 Pgadmin4 的 Web 界面
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此时，Pgadmin4 已经成功安装。要从网络浏览器访问它，请前往以下地址：
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http://server-ip/pgadmin4
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你会看到登录网页界面。请确保提供你在运行安装脚本时提供的 Email 和密码，并点击 “Login”。
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![][7]
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登录后，Pgadmin4的仪表板将出现在视图中，如图所示。
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![][8]
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要添加一个可以由 Pgadmin4 管理的服务器，请点击 “Add New Server”。
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![][9]
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在 “General” 选项卡中，填写服务器的名称，并添加注释，以便更好地描述。
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![][10]
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接下来，点击 “Connection”，填写主机名/地址、端口、维护数据库、用户名和密码。然后最后点击 “Save”。
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![][11]
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此后，你会看到 PosrgreSQL 服务器的统计数据显示在互动和直观的仪表板上。在左边的侧边栏，你可以浏览各种 PostgreSQL 参数。
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![][12]
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##### 总结
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我们希望你觉得本指南内容丰富，请在下面的评论部分发表你的疑问和反馈。
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--------------------------------------------------------------------------------
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||||
via: https://www.linuxtechi.com/how-to-install-pgadmin-on-rhel/
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作者：[Pradeep Kumar][a]
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选题：[lkxed][b]
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译者：[geekpi](https://github.com/geekpi)
|
||||
校对：[校对者ID](https://github.com/校对者ID)
|
||||
|
||||
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
|
||||
|
||||
[a]: https://www.linuxtechi.com/author/pradeep/
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[b]: https://github.com/lkxed/
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[1]: https://www.linuxtechi.com/wp-content/uploads/2023/03/Install-pgadmin4-rhel9-dnf-command.png
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[2]: https://www.linuxtechi.com/wp-content/uploads/2023/03/Pgadmin4-RPM-Package-Information-RHEL9.png
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[3]: https://www.linuxtechi.com/wp-content/uploads/2023/03/Start-Enable-Http-Pgadmin-RHEL9.png?ezimgfmt=ng:webp/ngcb22
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[4]: https://www.linuxtechi.com/wp-content/uploads/2023/03/semange-not-found-pgadmin4-rhel9.png?ezimgfmt=ng:webp/ngcb22
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[5]: https://www.linuxtechi.com/wp-content/uploads/2023/03/DNF-Whatprovides-semanage-RHEL9.png?ezimgfmt=ng:webp/ngcb22
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[6]: https://www.linuxtechi.com/wp-content/uploads/2023/03/pgadmin-setup-web-script-rhel9.png?ezimgfmt=ng:webp/ngcb22
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[7]: https://www.linuxtechi.com/wp-content/uploads/2023/03/Pgadmin4-Login-Page-RHEL9.png?ezimgfmt=ng:webp/ngcb22
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[8]: https://www.linuxtechi.com/wp-content/uploads/2023/03/Dashboard-Pgadmin4-RHEL9.png?ezimgfmt=ng:webp/ngcb22
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[9]: https://www.linuxtechi.com/wp-content/uploads/2023/03/Add-New-PostgreSQL-to-Pgadmin4-RHEL9.png?ezimgfmt=ng:webp/ngcb22
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[10]: https://www.linuxtechi.com/wp-content/uploads/2023/03/General-Description-Pgadmin-New-PostgreSQL.png?ezimgfmt=ng:webp/ngcb22
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[11]: https://www.linuxtechi.com/wp-content/uploads/2023/03/Connection-Details-PostgreSQL-Pgadmin4-GUI.png?ezimgfmt=ng:webp/ngcb22
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[12]: https://www.linuxtechi.com/wp-content/uploads/2023/03/PostgreSQL-Statistics-Dashboard-Pgadmin4.png?ezimgfmt=ng:webp/ngcb22
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Loading…
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