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1 Ubuntu Server GuideUbuntu Server GuideCopyright 2012 Contributors to the documentAbstractWelcome to the Ubuntu Server Guide ! It contains information on how to install and configure various serverapplications on your Ubuntu system to fit your needs. It is a step-by-step, task-oriented Guide for configuringand customizing your and LicenseThis document is maintained by the Ubuntu documentation team ( ). A list of contributors 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.

2 All derivative worksmust be released under this documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warrantyof MERCHANTABILITY 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 Ubuntu Documentation 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 of Contents1.

3 Introduction .. 11. Support .. 22. Installation .. 31. Preparing to Install .. 42. Installing from CD .. 63. Upgrading .. 94. Advanced Installation .. 105. Kernel Crash Dump .. 173. Package Management .. 201. Introduction .. 212. dpkg .. 223. Apt-Get .. 234. Aptitude .. 255. Automatic Updates .. 276. Configuration .. 297. References .. 314. Networking .. 321. Network Configuration .. 332. TCP/IP .. 423. Dynamic Host Configuration Protocol (DHCP) .. 464. Time Synchronisation with NTP .. 495.

4 DM-Multipath .. 511. Device Mapper Multipathing .. 522. Multipath Devices .. 553. Setting up DM-Multipath Overview .. 584. The DM-Multipath Configuration File .. 625. DM-Multipath Administration and Troubleshooting .. 746. Remote Administration .. 791. OpenSSH Server .. 802. Puppet .. 833. Zentyal .. 867. Network Authentication .. 901. OpenLDAP Server .. 912. Samba and LDAP .. 1173. Kerberos .. 1234. Kerberos and LDAP .. 1318. Domain Name Service (DNS) .. 1381. Installation .. 1392. Configuration .. 1403. Troubleshooting.

5 146 Ubuntu Server Guideiv4. References .. 1509. Security .. 1511. User Management .. 1522. Console Security .. 1583. Firewall .. 1594. AppArmor .. 1665. Certificates .. 1706. eCryptfs .. 17510. Monitoring .. 1771. Overview .. 1782. Nagios .. 1793. Munin .. 18311. Web Servers .. 1851. HTTPD - Apache2 Web Server .. 1862. PHP5 - Scripting Language .. 1943. Squid - Proxy Server .. 1964. Ruby on Rails .. 1985. Apache Tomcat .. 20012. Databases .. 2041. MySQL .. 2052. PostgreSQL .. 21013.

6 LAMP Applications .. 2131. Overview .. 2142. Moin Moin .. 2153. MediaWiki .. 2174. phpMyAdmin .. 2195. WordPress .. 22114. File Servers .. 2241. FTP Server .. 2252. Network File System (NFS) .. 2293. iSCSI Initiator .. 2314. CUPS - Print Server .. 23415. Email Services .. 2371. Postfix .. 2382. Exim4 .. 2463. Dovecot Server .. 2494. Mailman .. 2515. Mail Filtering .. 25716. Chat Applications .. 2641. Overview .. 2652. IRC Server .. 2663. Jabber Instant Messaging Server .. 268 Ubuntu Server Guidev17.

7 Version Control System .. 2701. Bazaar .. 2712. Git .. 2723. Subversion .. 2754. References .. 28018. Samba .. 2811. Introduction .. 2822. File Server .. 2833. Print Server .. 2864. Securing File and Print Server .. 2885. As a Domain Controller .. 2936. Active Directory Integration .. 29719. Backups .. 2991. Shell Scripts .. 3002. Archive Rotation .. 3043. Bacula .. 30720. Virtualization .. 3121. libvirt .. 3132. Cloud images and vmbuilder .. 3183. Ubuntu Cloud .. 3294. LXC .. 33621.

8 Clustering .. 3591. DRBD .. 36022. VPN .. 3631. OpenVPN .. 36423. Other Useful Applications .. 3771. pam_motd .. 3782. etckeeper .. 3803. Byobu .. 3824. References .. 384A. Appendix .. 3851. Reporting Bugs in Ubuntu Server Edition .. 386viList of Recommended Minimum Requirements .. Priority Checker Conversion .. DM-Multipath Components .. Multipath Configuration Defaults .. Multipath Attributes .. Device Attributes .. Useful multipath Command Options .. Access Methods .. Container commands.

9 3491 Chapter 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 detailsare covered in Chapter 2, Installation [p. 3], but if you need detailed instructions installingUbuntu please refer 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 supportand community support.

10 The main commercial support (and development funding) is available fromCanonical Ltd. They supply reasonably priced support contracts on a per desktop or per Server more information see the Canonical Services3 support is also provided by dedicated individuals, and companies, that wish to makeUbuntu the best distribution possible. Support is provided through multiple mailing lists, IRCchannels, forums, blogs, wikis, etc. The large amount of information available can be overwhelming,but a good search engine query can usually provide an answer to your questions. See the UbuntuSupport4 page for more 2. InstallationThis chapter provides a quick overview of installing Ubuntu Server Edition.