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1 Ubuntu Server GuideUbuntu Server GuideCopyright 2016 Contributors to the documentAbstractWelcome to the Ubuntu Server Guide ! It contains information on how to install and configure various Server applicationson your Ubuntu system to fit your needs. It is a step-by-step, task-oriented Guide for configuring and customizing and LicenseThis document is maintained by the Ubuntu documentation team ( ). A list of contributors is document is made available under the Creative Commons ShareAlike License (CC-BY-SA).You are free to modify, extend, and improve the Ubuntu documentation source code under the terms of this license. All derivative works must bereleased under this documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY.

2 Without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE AS DESCRIBED IN THE copy of the license is available here: Creative Commons ShareAlike to this document are: Members of the Ubuntu Documentation Project2 Members of the Ubuntu Server Team3 Contributors to the Community Help Wiki4 Other contributors can be found in the revision history of the serverguide5 and Ubuntu -docs6 bzr branches available on ~ Ubuntu -core-doc3 ~ Ubuntu -server4 ~ Ubuntu -core-doc/serverguide/trunk/chang es6 ~ Ubuntu -core-doc/ Ubuntu -docs/trunk/chang esTable of Contents1. 11. 22. 31. Preparing to 42.

3 Installing from 63. 94. Advanced 105. Kernel Crash 193. Package 251. 262. 273. 284. 305. Automatic 326. 347. 364. 371. Network 382. 473. Dynamic Host Configuration Protocol (DHCP).. 514. Time Synchronisation with 545. Data Plane Development 575. 721. Device Mapper 732. Multipath 763. Setting up DM-Multipath 794. The DM-Multipath Configuration 835. DM-Multipath Administration and 956. Remote 1001. OpenSSH 1012. 1043. 1077. Network 1111. OpenLDAP 1122. Samba and 1383. 1444. Kerberos and 1525.

4 SSSD and Active 1598. Domain Name Service (DNS).. 1641. 165iiiUbuntu Server Guide2. 1663. 1724. 1769. 1771. User 1782. Console 1843. 1854. 1925. 1966. 20110. 2031. 2042. 2053. 20911. Web 2111. HTTPD - Apache2 Web 2122. PHP - Scripting 2193. Squid - Proxy 2214. Ruby on 2245. Apache 22612. 2301. 2312. 23613. LAMP 2391. 2402. Moin 2413. 2434. 24514. File 2471. FTP 2482. Network File System (NFS).. 2523. iSCSI 2544. CUPS - Print 25715. Email 2601. 2612. 2693. Dovecot 2724.

5 2745. Mail 28016. Chat 2871. 2882. IRC 289ivUbuntu Server Guide3. Jabber Instant Messaging 29117. Version Control 2931. 2942. 2953. 2984. 30318. 3041. 3052. File 3063. Print 3094. Securing File and Print 3115. As a Domain 3166. Active Directory 32019. 3221. Shell 3232. Archive 3273. 33020. 3351. 3362. 3423. Cloud images and 3444. Ubuntu 3485. 3496. 36021. Control 3751. 3762. 3773. 3784. 3795. 38022. 3811. 38223. 3851. 38624. Other Useful 4001. 4012. 4033.

6 405A. 4071. Reporting Bugs in Ubuntu Server 408vList of Recommended Minimum Priority Checker DM-Multipath Multipath Configuration Multipath Device Useful multipath Command Access 299viChapter 1. IntroductionWelcome to the Ubuntu Server Guide !Here you can find information on how to install and configure various Server applications. It is a step-by-step,task-oriented Guide for configuring and customizing your Guide assumes you have a basic understanding of your Ubuntu system. Some installation details arecovered in Chapter 2, Installation [p. 3], but if you need detailed instructions installing Ubuntu pleaserefer to the Ubuntu Installation HTML version of the manual is available online at the Ubuntu Documentation SupportThere are a couple of different ways that Ubuntu Server Edition is supported: commercial support andcommunity support.

7 The main commercial support (and development funding) is available from Canonical,Ltd. They supply reasonably- priced support contracts on a per desktop or per Server basis. For moreinformation see the Ubuntu Advantage3 support is also provided by dedicated individuals and companies that wish to make Ubuntu thebest distribution possible. Support is provided through multiple mailing lists, IRC channels, forums, blogs,wikis, etc. The large amount of information available can be overwhelming, but a good search engine querycan usually provide an answer to your questions. See the Ubuntu Support4 page for more 2. InstallationThis chapter provides a quick overview of installing Ubuntu LTS Server Edition.

8 For more detailedinstructions, please refer to the Ubuntu Installation Preparing to InstallThis section explains various aspects to consider before starting the System RequirementsUbuntu LTS Server Edition supports three (3) major architectures: Intel x86, AMD64 and ARM. Thetable below lists recommended hardware specifications. Depending on your needs, you might manage withless than this. However, most users risk being frustrated if they ignore these Recommended Minimum RequirementsHard Drive SpaceInstall TypeCPURAMBase SystemAll Tasks InstalledServer (Standard)1 gigahertz512 megabytes1 gigabytesServer (Minimal)300 megahertz192 megabytes700 gigabytesThe Server Edition provides a common base for all sorts of Server applications.

9 It is a minimalist designproviding a platform for the desired services, such as file/print services, web hosting, email hosting, Server and Desktop DifferencesThere are a few differences between the Ubuntu Server Edition and the Ubuntu Desktop Edition. It should benoted that both editions use the same apt repositories, making it just as easy to install a Server application onthe Desktop Edition as it is on the Server differences between the two editions are the lack of an X window environment in the Server Edition andthe installation Kernel Differences: Ubuntu version and prior, actually had different kernels for the Server and desktop editions.

10 Ubuntu nolonger has separate - Server and -generic kernel flavors. These have been merged into a single -generic kernelflavor to help reduce the maintenance burden over the life of the running a 64-bit version of Ubuntu on 64-bit processors you are not limited by memoryaddressing see all kernel configuration options you can look through / Also, LinuxKernel in a Nutshell2 is a great resource on the options Backing Up Before installing Ubuntu Server Edition you should make sure all data on the system is backed up. SeeChapter 19, Backups [p. 322] for backup this is not the first time an operating system has been installed on your computer, it is likely you willneed to re-partition your disk to make room for time you partition your disk, you should be prepared to lose everything on the disk should you make amistake or something goes wrong during partitioning.