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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)
Buy this Book
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Webmin Administrator's Cookbook

Webmin Administrator's Cookbook

4 (11)
By: Michal Karzynski
Buy this Book

Overview of this book

Written in a cookbook format with practical recipes this book helps you to perform various administrative tasks using Webmin and enables you to perform common jobs more efficiently. This book is perfect for System administrators who want to learn more advanced concepts of Webmin and how it can help to set up a server for development, testing or deployment.
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
4
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
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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

Executing a command as another user

Sometimes, it's useful to execute commands as another user. For instance, management commands for some services are, by default, accessible to the system user associated with the service. You may also wish to test whether a user account is configured correctly and execute a command as another user to check if it will work as expected.

Getting ready

In this recipe, we will create a new PostgreSQL database named testdb by issuing the createdb command that is available to the postgres user. If you do not have PostgreSQL installed yet, you may refer to Chapter 10, Running a PostgreSQL Database Server, for information about installing and running this database system.

How to do it...

To execute a command as another user, we will use the Running Processes module:

  1. Navigate to System | Running Processes.

  2. Select Run.. in the Display line.

  3. Enter createdb testdb in the Command to run textbox.

  4. Select Wait until complete as Run mode.

  5. Enter postgres in the Run as user textbox...

CONTINUE READING
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Webmin Administrator's Cookbook
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