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  • Book Overview & Buying Webmin Administrator's Cookbook
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Webmin Administrator's Cookbook

Webmin Administrator's Cookbook

By : Michal Karzynski
4 (11)
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Webmin Administrator's Cookbook

Webmin Administrator's Cookbook

4 (11)
By: Michal Karzynski
Buy this Book

Overview of this book

Table of Contents (19 chapters)
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Webmin Administrator's Cookbook
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Webmin Administrator's Cookbook
Credits
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Credits
About the Author
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About the Author
About the Reviewers
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About the Reviewers
www.PacktPub.com
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www.PacktPub.com
Preface
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Preface
Lock Free Chapter
1
Setting Up Your System
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Setting Up Your System
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Introduction
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Installing Webmin on a Debian-based system
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Installing Webmin on an RPM-based system
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Installing Webmin on another system
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Connecting to Webmin
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Installing additional Webmin modules
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Monitoring what Webmin is doing
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Controlling which system services are started at boot
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Inspecting the installed software packages
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Installing software packages
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Updating the installed packages to the latest versions
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Enabling Webmin to send an e-mail
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Getting an e-mail when new versions of packages become available
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Reading the documentation of the installed software
2
User Management
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User Management
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Introduction
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Creating a Webmin user
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Creating a Webmin group with access to specific modules and options
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Allowing users to log in to Webmin with the system credentials
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Creating Webmin users based on system accounts
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Controlling who is currently using Webmin
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Creating a system user account
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Modifying a user's UID and other information
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Temporarily disabling a user account
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Creating and editing a system group
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Changing a user's password
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Exporting users and importing them into another system
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Installing Usermin
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Securing Your System
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Securing Your System
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Introduction
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Setting up a Linux firewall
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Allowing access to a service through the firewall
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Verifying your firewall by port scanning
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Turning off unnecessary services
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Verifying the strength of passwords
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Disabling root login over SSH
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Restricting Webmin access to a specific IP
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Connecting to Webmin securely over an SSH tunnel
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Closing inactive Webmin sessions automatically
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Controlling Your System
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Controlling Your System
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Introduction
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Executing a command on the server
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Executing a command as another user
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Setting a command to be executed in the future
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Scheduling a command to run regularly with cron
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Creating a panel for the commands that you execute often
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Creating a panel with the database commands that you execute often
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Running a terminal emulator in the browser
5
Monitoring Your System
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Monitoring Your System
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Introduction
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Viewing and searching through system logfiles
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Saving Syslog messages to a file
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Adding other logfiles to Webmin
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Configuring logfile rotation
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Listing recent logins
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Receiving an e-mail when a service stops running
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Automatically restarting a service that goes down
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Monitoring a remote server
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Managing Files on Your System
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Managing Files on Your System
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Introduction
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Downloading files from the server
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Uploading files to the server
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Managing files and directories on the server
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Changing file ownership and permissions
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Setting up network-shared folders for Windows
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Mounting a Windows-shared folder
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Setting up an NFS-shared volume
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Mounting a remote NFS volume
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Giving users access to your server via SFTP
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Giving users access to your server via FTP
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Backing Up Your System
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Backing Up Your System
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Introduction
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Backing up configuration files
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Restoring configuration files from backup
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Automatically backing up configuration files
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Creating a backup of a selected directory
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Creating a backup of an entire mount point
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Backing up to a remote host
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Setting up automatic backups
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Backing up databases
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Running an Apache Web Server
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Running an Apache Web Server
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Introduction
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Installing Apache on your system
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Restarting Apache
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Enabling Apache modules
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Creating a static HTML site
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Creating a virtual host
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Setting options for directories, files, and locations
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Creating a password-protected website
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Displaying a listing of files in a directory
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Redirecting incoming requests
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Setting up encrypted websites with SSL
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Logging incoming requests and errors
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Analyzing logfiles using Webalizer
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Running a MySQL Database Server
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Running a MySQL Database Server
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Introduction
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Installing the MySQL database server
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Allowing access to MySQL over the network
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Accessing your MySQL server over an SSH tunnel
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Creating a new database
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Creating users and granting permissions to databases
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Creating a backup of your database
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Executing custom SQL commands
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Restoring database from the backup
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Editing the structure of your database
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Editing records in a database
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Checking who is using your database server
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Installing phpMyAdmin
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Running a PostgreSQL Database Server
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Running a PostgreSQL Database Server
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Introduction
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Installing the PostgreSQL database server
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Locating the PostgreSQL server configuration files
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Allowing access to PostgreSQL over the network
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Accessing the PostgreSQL server over an SSH tunnel
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Creating a new database
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Creating users and granting permissions
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Creating a backup of your database
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Executing custom SQL commands
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Restoring a database from backup
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Editing the structure of your database
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Editing records in a database
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Installing phpPgAdmin
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Running Web Applications
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Running Web Applications
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Introduction
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Generating dynamic pages using CGI
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Installing PHP
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Changing PHP configuration settings
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Displaying PHP errors while debugging
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Logging in PHP
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Installing WordPress on your server
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Installing Drupal on your server
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Installing a Django-based application using mod_wsgi
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Setting Up an E-mail Server
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Setting Up an E-mail Server
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Introduction
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Setting up your server to send and receive e-mails
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Setting up secure IMAP access to mailboxes
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Setting up a secure SMTP relay for users
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Controlling the mail queue
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Reading and writing e-mails on the server
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Configuring e-mail aliases
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Filtering incoming mail using Procmail and SpamAssassin
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Debugging e-mail-related problems
1
Index
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Index

Installing additional Webmin modules

Webmin has a modular architecture and it's possible to extend it by installing additional modules. The majority of stable Webmin modules come bundled into Webmin, so in most cases you don't actually need to install them. Modules, which are installed but not active, are located in the Un-used Modules section of the menu. They will usually become activated automatically when you install the software that they depend on. For instance, you may see the MySQL Database Server module listed in this section. When you install MySQL or other supported software on your system, Webmin will detect it and move the appropriate module into its section in the menu.

After you install the additional software, you may need to click the Refresh Modules link at the bottom of the menu and reload the browser for this update to happen.

Getting ready

If you find a good third-party module that doesn't come bundled with Webmin, you can install it by following this recipe. Just a word of warning: a Webmin module will have privileged access to your system; you should never install modules from sources you don't fully trust.

How to do it...

To install additional Webmin modules, perform the following steps:

  1. Copy the URL of a Webmin module's location. It will be in a file with the .wbm or .wbm.gz extension.

  2. Navigate to the Install tab by going to Webmin | Webmin Configuration | Webmin Modules. You will get the following screen:

  3. Select the option to install From ftp or http URL and paste the module's URL in the text field provided.

  4. Before you install a module, you can choose which users will be allowed to use it. Select Grant access to all Webmin users.

  5. Click Install Module. The next screen will display installation progress, information about where the module was installed on disk, which section of the menu it will be available in, and a link to the module screen.

  6. Reload Webmin to see the new module appear in the menu.

How it works...

Webmin will download and decompress the module archive file and place a new module folder on disk in the /usr/share/webmin/ directory. When you reload Webmin, it will scan the modules directory, discover the new module, and add it to its menu.

Each Webmin module can be made available to all users or a selected group. This choice can be made during the installation of the module or it can be done later in Webmin | Webmin users settings. More information about users and access control can be found in Chapter 2, User Management.

There's more...

Webmin can also download module files from two repositories: the standard module repository hosted at webmin.com and a repository of third-party modules that may be hosted anywhere on the Internet.

Installing a module from a repository

In order to install a module from one of the repositories, perform the following steps:

  1. Navigate to Webmin | Webmin Configuration | Webmin Modules | Install.

  2. Click on the ellipsis (...) button at the end of the line Standard module from www.webmin.com or Third party module from.

  3. Select the module you'd like to install and install as described previously.

Webmin will download the file automatically from the repository's URL.

Uninstalling a module

If you'd like to uninstall a module, navigate to Webmin | Webmin Configuration | Webmin Modules | Delete, select the module or modules you want to remove, and click Delete Selected Modules. In the next screen, you will be asked to confirm your action and the modules will be deleted.

See also

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