The minimal iso image will download packages from online archives at installation time instead of providing them on the install media itself. Downloading packages at install time reduces the size of the iso image to approximately ~40MB depending on architecture (see below), as well as providing only the packages needed for installation. The download time savings achieved by using a mini iso can be significant, as only current packages are downloaded, so there is no need to upgrade packages immediately after installation. The mini iso uses a text-based installer, making the image as compact as possible.
To use the mini iso image download mini.iso from one of the following links and burn it to a CD or USB drive.
For help with CD burning, see BurningIsoHowto
For help with USB drive burning, see Installation/FromUSBStick
For differences between Ubuntu release versions, please see Releases.
To install, boot your computer from the the mini iso and select "Install" at the prompt. You can then follow the instructions from the text-based installer. On the software selection screen, you can select from a number of collections of software such as different desktop environments (kde, xfce, etc), a multitude of different servers, multimedia creation tools, media center (mythbuntu), etc. You can also select "Manual package selection" which will take you to aptitude. You may also select nothing and just continue to finish the installation. If you selected nothing, upon reboot you will arrive at a cli prompt; from here you can fully customize your new system.
Note: While the minimal iso image is handy, it isn't useful for installing on UEFI-based systems that you want to run in UEFI mode. The mini iso lacks the proper files for booting the computer in UEFI mode. Thus, the computer will boot in BIOS compatibility mode, and the installation will be in BIOS mode.
64-bit PC (amd64, x86_64) (Recommended)
Ubuntu 15.10 "Wily Werewolf" 40MB (MD5: d1498749e073ef7fd09f84478f299bea, SHA1: aa659499dc300fe2be00d756180793093cc15014)
Ubuntu 14.04 LTS "Trusty Tahr" 37MB (MD5: 7297321c2fa6424417a548c85edd6e98, SHA1: e1e074b4302898698977c08013e0afe5c06245e2)
Ubuntu 12.04 LTS "Precise Pangolin" 30MB (MD5: 1278936cb0ee9d9a32961dd7743fa75c, SHA1: f91282c671b5ac52163d5cb925ac71b7e20420bc)
32-bit PC (i386, x86)
Ubuntu 15.10 "Wily Werewolf" 34MB (MD5: 088ae2ec267989f05540a7e147bc634c, SHA1: 32b16e6f8e0cbd37928c73cd16654c62876d8ef4)
Ubuntu 14.04 LTS "Trusty Tahr" 31MB (MD5: a2502844750ecb6477d8fb4ff6b9aaf8, SHA1: d17c34ce716f13396040ccdc02d32482ed6b01a1)
Ubuntu 12.04 LTS "Precise Pangolin" 27MB (MD5: e4d16caf537be112f3dc9ba94e158cf7, SHA1: 763a00069b3f305f0d9248d6c3e582bb65ef7a25)
64-bit PowerPC (ppc64)**
Ubuntu 15.10 "Wily Werewolf" 45MB (MD5: 3bf5a23b998383afe621012389cc7a9b, SHA1: 241d645fe4696b33bb75b522848907c37877e2ba)
Ubuntu 14.04 LTS "Trusty Tahr" 41MB (MD5: 81e3a1d934e9c8b9809c3fe20c387aec, SHA1: 72250efd801ea109f6e7d5c2e035f4c7a23de95c)
Ubuntu 12.04 LTS "Precise Pangolin" 41MB (MD5: 8d1a6023ae3d4d6bcd27fa1db86f83fd, SHA1: b5671f15407051ef9f5d76ffb5d70a9165b25c79)
32-bit PowerPC (ppc)**
Ubuntu 15.10 "Wily Werewolf" 31MB (MD5: 10a04b4d597e4c409d97901a1b442785, SHA1: 7015c11550e0558c2f02dc4d6af69dffd61dafa4)
Ubuntu 14.04 LTS "Trusty Tahr" 29MB (MD5: 959bd251ae4fcc4ea8457de555ddaf27, SHA1: 52d3c31ebd9710707eed0bfa318aa5b9ac3b59b4)
Ubuntu 12.04 LTS "Precise Pangolin" 28MB (MD5: 3e545cedd2ead6f00fe46b386a8a3d7e, SHA1: 27c6e675ec7d6b767d7b94074ce00208cb1964bb)
** Unofficial port, unsupported by Canonical