Ubuntu Server Guide

Welcome to the Ubuntu Server Guide!

Changes, Errors, and Bugs

This is the preliminary and in development for Ubuntu 20.04 LTS, Focal Fossa. Contents may have errors and omissions. Ubuntu serverguides for previous LTS versions: 18.04 (PDF), 16.04 (PDF). If you find any errors or have suggestions for improvements to pages, please use the link at the bottom of each topic titled: "Help improve this document in the forum." This link will take you to the Server Discourse forum for the specific page you are viewing. There you can share your comments or let us know about bugs with each page.

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Download this guide as a PDF

Support

There are a couple of different ways that Ubuntu Server Edition is supported: commercial support and community support. 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 more information see the Ubuntu Advantage page. Community support is also provided by dedicated individuals and companies that wish to make Ubuntu the best 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 query can usually provide an answer to your questions. See the Ubuntu Support page for more information.

Welcome to the Ubuntu Server Guide!

Changes, Errors, and Bugs

This is the preliminary and in development for Ubuntu 20.04 LTS, Focal Fossa. Contents may have errors and omissions. Ubuntu serverguides for previous LTS versions: 18.04 (PDF), 16.04 (PDF). If you find any errors or have suggestions for improvements to pages, please use the link at the bottom of each topic titled: "Help improve this document in the forum." This link will take you to the Server Discourse forum for the specific page you are viewing. There you can share your comments or let us know about bugs with each page.

Offline

Download this guide as a PDF

Support

There are a couple of different ways that Ubuntu Server Edition is supported: commercial support and community support. 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 more information see the Ubuntu Advantage page.

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Community support is also provided by dedicated individuals and companies that wish to make Ubuntu the best 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 query can usually provide an answer to your questions. See the Ubuntu Support page for more information.

Navigation

? Introduction

Install

? Installation ? Installation - Advanced ? Installation - iSCSI ? Package Management ? Kernel Crash Dump ? Reporting Bugs ? Upgrade - Introduction

Storage

? Multipath - Introduction ? Multipath - Configuration ? Multipath - Setup ? Multipath - Usage & Debug

Network

? Introduction ? Configuration ? DHCP ? NTP ? DPDK ? OpenVswitch-DPDK

Security

? Introduction ? Users ? AppArmor ? Firewall ? Certificates ? Console

Virtualization

? Introduction ? qemu ? libvirt ? multipass

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? uvt ? virt tools

Containers

? lxd ? lxc

Services

? Databases - Introduction ? Databases - Mysql ? Databases - PostgreSQL ? Samba - Introduction ? Samba - Active Directory ? Samba - Domain Controller ? Samba - File Server ? Samba - Print Server ? Samba - Securing ? Samba - OpenLDAP Backend ? Service - CUPS ? Service - Domain Name Service (DNS) ? Service - FTP ? Service - iSCSI ? Service - Kerberos ? Service - Kerberos with OpenLDAP backend ? Service - LDAP ? Service - LDAP Access Control ? Service - LDAP Replication ? Service - LDAP Usage ? Service - LDAP with TLS ? Service - NFS ? Service - OpenSSH ? Service - OpenVPN ? Service - gitolite ? VPN Clients ? Service - SSSD ? Mail - Introduction ? Mail - Dovecot ? Mail - Exim4 ? Mail - Postfix ? Proxy Servers - Squid ? Web Servers - Introduction ? Web Servers - Apache

Ubuntu High Availability

? HA - Introduction ? HA - Corosync ? HA - Pacemaker ? HA - Pacemaker - Resource Agents ? HA - Pacemaker - Fence Agents

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? HA - DRBD

Tools

? logwatch ? byobu ? etckeeper ? munin ? nagios ? pam_motd ? Puppet ? Monitoring ? rsnapshot

Programming

? PHP ? Ruby on Rails

Backups

? Introduction ? Archive Rotation ? Bacula ? Shell Scripts

LAMP

? LAMP Applications

URLs

[details=Mapping table] | Topic | Path | | ? | ? | | | /server/docs/introduction | | | /server/docs/installation | | | /server/docs/installationadvanced | | | /server/docs/installation-iscsi | | | /server/docs/package-management | | | /server/docs/kernel-crash-dump | | | /server/docs/reporting-bugs | | introduction/11576 | /server/docs/upgrade-introduction | | | /server/docs/device-mapper-multipathing-introduction | | | /server/docs/devicemapper-multipathing-configuration | | | /server/docs/device-mapper-multipathing-setup | | | /server/docs/device-mapper-multipathing-usage-debug | | | /server/docs/network-introduction | | | /server/docs/network-configuration | | | /server/docs/network-dhcp | | ntp/11878 | /server/docs/network-ntp | | |

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/server/docs/network-dpdk | | | /server/docs/openvswitchdpdk | | | /server/docs/security-introduction | | | /server/docs/security-users | | apparmor/11884 | /server/docs/security-apparmor | | | /server/docs/security-firewall | | | /server/docs/securitycertificates | | | /server/docs/security-console | | | /server/docs/security-ecryptfs | | introduction/11521 | /server/docs/virtualization-introduction | | | /server/docs/virtualization-multipass | | | /server/docs/virtualization-qemu | | | /server/docs/virtualization-libvirt | | | /server/docs/virtualization-uvt | | | /server/docs/virtualization-virt-tools | | | /server/docs/containers-lxd | | | /server/docs/containers-lxc | | | /server/docs/databasesintroduction | | | /server/docs/databases-mysql | | | /server/docs/databases-postgresql | | | /server/docs/samba-active-directory | | | /server/docs/samba-domaincontroller | | | /server/docs/samba-file-server | | | /server/docs/samba-introduction | | | /server/docs/samba-print-server | | | /server/docs/samba-securing | | openldap-backend/15698 | /server/docs/samba-openldap-backend | | | /server/docs/service-cups | | | /server/docs/service-domain-name-service-dns | | | /server/docs/service-ftp | | | /server/docs/service-introduction | | | /server/docs/serviceiscsi | | | /server/docs/service-kerberos | | | /server/docs/service-kerberos-with-openldapbackend | | | /server/docs/service-ldap | | ldap-access-control/15583 | /server/docs/service-ldap-access-control| | | /server/docs/service-ldap-replication | | | /server/docs/service-ldap-usage | | | /server/docs/service-ldap-with-tls | | | /server/docs/service-nfs | | | /server/docs/serviceopenssh | | | /server/docs/service-openvpn | | | /server/docs/service-gitolite | | | /server/docs/vpn-clients | | | /server/docs/service-sssd | | | /server/docs/chatirc-server | | | /server/docs/mail-dovecot | | | /server/docs/mail-exim4 | | | /server/docs/mail-introduction | | | /server/docs/mail-mailman | | | /server/docs/mailpostfix | | | /server/docs/proxy-servers-squid | | | /server/docs/web-servers-apache | | | /server/docs/web-servers-apachetomcat | | | /server/docs/web-serversintroduction | | | /server/docs/ubuntu-haintroduction | | | /server/docs/ubuntu-ha-pacemaker-resource-agents-supportability | | | /server/docs/ubuntu-ha-pacemaker-fence-agentssupportability | | | /server/docs/ubuntu-ha-drbd | | | /server/docs/tools-byobu | |

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