ubuntu15.04 ubuntutvivid Ubuntu 15.04 Ubuntu 15.04 Ubuntu 15.04 우분투 15.05 Ubuntu 15.04 Ubuntu 15.04 Ubuntu 15.04 Ubuntu 15.04 Ubuntu 15.04 Ubuntu 15.04 Ubuntu 15.04 Ubuntu 15.04 Ubuntu 15.04 Ubuntu 15.04 15.04 Canonical Ltd Canonical Ltd Canonical Ltd Canonical Ltd Canonical Ltd Canonical Ltd Canonical Ltd Canonical Ltd Canonical Ltd Canonical Ltd Canonical Ltd Canonical Ltd Canonical Ltd Canonical Ltd Canonical Ltd linux ubuntu Vivid Vervet 2015-04-23 2016-02-04 1000000000 1 1073741824 5368709120 1000000000 1073741824 16106127360 https://old-releases.ubuntu.com/releases/vivid/ubuntu-15.04-server-i386.iso Ubuntu-Server 15.04(.\d\+?)? i386 install/vmlinuz install/initrd.gz