A collection of UnixLinuxBSD commands and tasks which are useful for IT work or for advanced users. RHEL-7-Installation-6.jpg' alt='Install Dhcp Server Red Hat Linux Versions' title='Install Dhcp Server Red Hat Linux Versions' />Linux Small Business Server Distros Linux Magazine. Admins of small businesses who want to cover all their infrastructure requirements with a single server are the target group of small business servers. In this article, we introduce three Linux distributions that meet this requirement. In 2. 00. 0, Microsoft introduced its Small Business Server and practically invented the category at the same time, but the company no longer offers the product today. In the world of Linux, however, a number of servers and platforms wrestle for the favor of small companies that must provide things like print and data services in heterogeneous networks. Small business servers are tailored to the needs of small businesses with 1. However, as a rule, they also have access to an extensive battery of tools for deployment, virtualization, backup, and monitoring, as well as a hierarchical team of staff to care for it. If, for example, you forget about theoretical ideals for a contemporary IT organization and take a close look at how small companies really work, the following picture becomes clear Usually, theres no full time administrator. If there is one, it is someone with above average IT knowledge. Compare the packages in the different versions of Red Hat. YoLinux Linux systems administration and configuration for server and desktop computers. Linux Information Portal includes informative tutorials and links to many. View and Download Red Hat LINUX 7. LINUX 7. 2 pdf manual download. We know youve got a cool bag with some smart ideas inside, so let us know Share your bag in our Lifehacker Go Bag Show and Tell Flickr pool, shoot me a message. Often, an ex web designer or an electronicsPLC specialist with IT knowledge limited to Windows is given the responsibility. Cross Section. A common denominator of the products designated as small business servers in contrast to normal Linux servers is the availability of management functions through a graphical user interface. A GUI caters to the target group admins with limited Linux know how. Often, this takes the form of a web interface. RHEL-7.3-Boot-Menu.jpg' alt='Install Dhcp Server Red Hat Linux Versions' title='Install Dhcp Server Red Hat Linux Versions' />The market offers plenty of alternatives in this sector. Univention, one of the best known manufacturers, offers Univention Corporate Server UCS both as a pure infrastructure solution, as well as with installed applications, such as a Groupware stack. Moreover, a number of third party products and manufacturers base their products on a certified UCS machine, such as Open Xchange with their Open Xchange Advanced Server Edition OXASE or the Appliance Edition of Zarafa. In this article, I look at the Zentyal all in one server manufactured by e. Box, the Clear. OS Community Edition from the Clear Foundation, and the Community Edition of the Resara server. Although I occasionally use UCS as a reference, I will not give a detailed introduction here because it has been covered before 1. Zentyal Servers. Zentyal is an Ubuntu based Small Business Server distributed in the past under the name e. Box. The product is developed by the Spanish open source company e. Box Technologies, and it is available as a free Basic Subscription as well as a Business and Enterprise Edition. Essentially, the differences lie in the number of users and the update services included. The e. Box business model is based on yearly support contracts and the server, which is available with various support levels and complementary services. The current 6. 4 bit Zentyal 2. Community Edition used for this test is also available in a 3. According to the Zentyal roadmap, version 3. Zentyal 3. 0 promises, above all, integration of Samba 4, placing Zentyal in direct competition with UCS and Resara in the area of Windows file services. Unfortunately, version 2. September 2. 01. 1, is no longer up to date as far as software packages are concerned, which in some cases could lead to weaknesses in security. Version 2. 2 runs on top of Ubuntu 1. LTS, whereas Zentyal v. Ubuntu 1. 2. 0. 4 LTS. As an alternative, the beta version 2. Building Under Ubuntu. Targeted at small and medium size enterprises as alternative to Microsoft Small Business Server, the Zentyal server offers numerous functions in the areas of routinggateway, network infrastructure, collaboration e. Zarafa, security, and communication that can be managed via a web interface. Installation is based on the Ubuntu installer but does without its graphical variation. The Ubuntu Alternate Installer requires no interaction except to specify a user account for the system user, hostname, and desired keyboard layout. As an alternative to the standard mode, the boot menu offers an expert mode with which experienced Linux users can integrate Ubuntu repositories e. Apt configuration, retrieve updated Ubuntu packages from a network mirror, or manually partition the hard drive. Both variations have entries in the boot menu for installing subscription versions. After rebooting, the automatic login opens a Firefox window on the Ubuntu system with the login page of the Zentyal administrative web interface, in which admins log in as the system user created during installation. Alternatively, the interface can be accessed from any host in the network via HTTPS. After the first login, the system displays an overview of the available packages. When admins click on one of the five large icons at the top of the screen, the GUI highlights the packages relevant to that topic. Admins can choose any combination of packages needed, and if desired, install them all at the same time, including the free Zarafa version. Tailor Made. A click on Install shows an overview of the packages or package groups selected for installation, which then must be confirmed by clicking OK before Zentyal begins with the installation. This first step takes a bit of time, but it is convenient because admins can assemble a custom configured small business server. Most of the preconfigured packages are practical and can be used as is with no additional configuration. The exceptions are configuration of network interfaces and the like. User input is needed to select the kind of server because, besides the standalone server scenario, Zentyal also offers one for role based multiserver operation that lets a Zentyal server serve as a backup domain controller in an Active Directory domain, for example Figure 1. During MTA configuration, administrators can also set the mail domain that is to be used. Finally, as would be expected, you may register a subscription at the end of the package installation. As mentioned previously, the subscriptions not only include vendor support, but also make advanced features available, such as configuring a backup to the Zentyal cloud, using a zentyal. After saving the changes, a click on Go to the Dashboard brings you back to the overview page of the configuration interface. The wealth of information could be intimidating at first, but it is easy to understand. A click on security updates under the General Information area will start the first update of the Ubuntu foundation. The functions of the web interface are largely intuitive and quite attractive and usable, reaching a level comparable to Webmin. Moreover, it is completely Ajax free, always requiring a complete reload of individual pages. The package groups seen during installation are reflected in the UTM, Gateway, Infrastructure, Office, and Communications sections of the navigation panel on the left side. Network configuration falls under the heading Core, and a click on Dashboard at the top of this group takes you to the overview Figure 2. On the Dashboard page, Module Status displays the services managed by the Zentyal server. Modules that have not been started can be activated with Core Module Status, and other components are added under Core Software Management. Infrastructure, Office, and Communications. The Zarafa installation is the quite recent version 7. Any further configuration of the groupware requires that a mail stack be activated and configured. The mail server configuration is found under the Communication section. Here, even configuring an SMTP relay with authentication over the web interface is possible. To save the mail configuration, the email module must first be installed and activated with Dashboard Module Status, and Zentyal kindly reminds you of this. Oracle Database Preinstallation Tasks. This chapter describes the tasks that you must complete before you start Oracle Universal Installer OUI. This guide contains information required to install Oracle Database 1. Release 2 1. 1. 2. Ensure that you review information related to the platform on which you intend to install Oracle Database 1. Note To use Oracle Automatic Storage Management Oracle ASM or Oracle Restart, you must first install Oracle Grid Infrastructure before you install and create the database. Otherwise, you must manually register the database with Oracle Restart. Additionally, see Requirements for Oracle Grid Infrastructure Installation before you proceed with the database preinstallation tasks. It includes information about the following topics 2. About Installing the Linux Operating System. This section describes how to install a supported Linux distribution. It contains the following topics 2. Completing a Minimal Linux Installation. To complete a minimal Linux installation, select one of the minimal installation options either a custom installation where you select the Minimal option from Package Group Selection, or where you deselect all packages except for the Base pack. This installation lacks many RPMs required for database installation, so you must use an RPM package for your Oracle Linux release to install the required packages. The package you use depends on your Linux release, and your support status with Unbreakable Linux Network ULN. Note. The Oracle Preinstallation RPM installs the X1. X Window System server packages. To use graphical user interfaces such as OUI, configuration assistants, and Oracle Enterprise Manager, set the display to a system with X Window System server packages. Refer to the following URL for documentation regarding installation of a reduced set of packages https support. CSPmainarticle NOT id7. Note. If you are not a member of Unbreakable Linux Network or Red Hat Support network, and you are a My Oracle Support customer, then you can download instructions to configure a script that documents installation of a reduced set of packages. CSPmainarticleNOT id5. You can also search for Linux reduced set of packages to locate the instructions. SSH is required for an Oracle Grid Infrastructure installation. Open. SSH should be included in the Linux distribution minimal installation. To confirm that SSH packages are installed, enter the following command. If you do not see a list of SSH packages, then install those packages for your Linux distribution. Completing a Default Linux Installation. If you do not install the Oracle Preinstallation RPM, then Oracle recommends that you install your Linux operating system with the default software packages RPMs. This installation includes most of the required packages and helps you limit manual verification of package dependencies. Update Error String Or Binary Data Would Be Truncated Pyramid. Oracle recommends that you do not customize the RPMs during installation. For information about a default installation, log on to My Oracle Support https support. Search for default rpms linux installation, and look for your Linux distribution. For example https support. CSPmainarticleNOT id4. After installation, review system requirements for your distribution to ensure that you have all required kernel packages installed, and complete all other configuration tasks required for your distribution and system configuration. About Oracle Linux and the Unbreakable Enterprise Kernel. Oracles Unbreakable Enterprise Kernel delivers the latest innovations from upstream development to customers who run Oracle Linux in the data center. The Unbreakable Enterprise Kernel is included and enabled by default starting with Oracle Linux 5 Update 6. The Unbreakable Enterprise Kernel is based on a recent stable mainline development Linux kernel, and also includes optimizations developed in collaboration with Oracle Database, Oracle middleware, and Oracle hardware engineering teams to ensure stability and optimal performance for the most demanding enterprise workloads. Oracle highly recommends deploying the Oracle Unbreakable Enterprise Kernel in your Linux environment, especially if you run enterprise applications. However, using Oracle Unbreakable Enterprise Kernel is optional. If you require strict RHEL kernel compatibility, then Oracle Linux also includes a kernel compatible with the RHEL Linux kernel, compiled directly from the RHEL source code. You can obtain more information about the Oracle Unbreakable Enterprise Kernel for Linux at the following URL http www. The Oracle Unbreakable Enterprise Kernel for Linux is the standard kernel used with Oracle products. The build and QA systems for Oracle Database and other Oracle products use the Oracle Unbreakable Enterprise Kernel for Linux exclusively. The Oracle Unbreakable Enterprise Kernel for Linux is also the kernel used in Oracle Exadata and Oracle Exalogic systems. Oracle Unbreakable Enterprise Kernel for Linux is used in all benchmark tests on Linux in which Oracle participates, as well as in the Oracle Preinstallation RPM program for x. Ksplice, which is part of Oracle Linux, updates the Linux operating system OS kernel, while it is running, without requiring restarts or any interruption. Ksplice is available only with Oracle Linux. About the Oracle Preinstallation RPMs and Oracle Validated RPMs. If your Linux distribution is Oracle Linux, then you can complete most preinstallation configuration tasks by using the Oracle Preinstallation RPM or Oracle Validated RPM for your release, which is available from the Oracle Linux Network, or available on the Oracle Linux DVDs. Using the Oracle Preinstallation RPM is not required, but Oracle recommends you use it to save time in setting up your cluster servers. When it is installed, the Oracle Preinstallation RPM or Oracle Validated RPM does the following Automatically downloads and installs any additional RPM packages needed for installing Oracle Grid Infrastructure and Oracle Database, and resolves any dependencies. Creates an oracle user, and creates the ora. Inventory oinstall and OSDBA dba groups for that user. As needed, sets sysctl. Oracle RDBMS Pre Install program. Sets hard and soft resource limits. Sets other recommended parameters, depending on your kernel version. To become an Oracle Linux Network customer, contact your sales representative, or purchase a license from the Oracle Linux store https shop. To register your server on the Unbreakable Linux Network, or to find out more information, see the following URL https linux. If you are using Oracle Linux 5. Oracle Preinstallation RPM is included on the install media. Note. The Oracle Preinstallation RPM designated for each Oracle Database release sets kernel parameters and resource limits only for the user account oracle. To use multiple software account owners, you must perform system configuration for other accounts manually. You can obtain Linux kernels from the Oracle Linux public Yum repository. The public Yum repository for Oracle Linux 4, Oracle Linux 5 and Oracle Linux 6 is available at the following URL http public yum. To become an Unbreakable Linux Network customer, contact your sales representative, or purchase a license from the Unbreakable Linux store https shop. To register your server on the Unbreakable Linux Network, or to find out more information, refer to the following URL https linux. If you are using Oracle Linux 4. Oracle Linux 5. 2 and higher, then the Oracle Preinstallation RPM or Oracle Validated RPM is included on the install media. Note. The Oracle Preinstallation RPM sets kernel parameters and resource limits only for the user account oracle. To use multiple software account owners, you must perform system configuration for other accounts manually. In addition, users and groups are created using the next available ID numbers.