取り残されていたUbuntu 9.04をアップグレードしようと思いましたが、EOFでアップグレードできませんでした。
$ sudo do-release-upgrade Checking for a new ubuntu release Done Upgrade tool signature Done Upgrade toolmin 30s Done downloading extracting 'lucid.tar.gz' authenticate 'lucid.tar.gz' against 'lucid.tar.gz.gpg' tar: メンバ名から先頭の `/' を取り除きます キャッシュを読み込み中です パッケージ・マネージャをチェック中です アップグレードできません An upgrade from 'jaunty' to 'lucid' is not supported with this tool. $
仕方ないので、手動でaptリポジトリを切り替えてアップグレードしました。
もともとold-releases.ubuntu.comでしのいでいたので以下のように修正しapt-get update & apt-get upgradeしました。
apt-get dist-upgradeも必要になると思ったのですが、/etc/lsb-releaseを確認したら10.04にアップグレードされていました。（もしかして、最初に失敗したdo-release-upgradeのせいかな？）
$ diff -u sources.list /etc/apt/sources.list | grep ^[-+] | grep -v ^$ --- sources.list 2012-01-14 13:15:15.000000000 +0900 +++ /etc/apt/sources.list 2012-01-14 13:16:02.000000000 +0900 -# deb cdrom:[Ubuntu-Server 9.04 _Jaunty Jackalope_ - Release i386 (20090421.1)]/ jaunty main restricted +# deb cdrom:[Ubuntu-Server 9.04 _Jaunty Jackalope_ - Release i386 (20090421.1)]/ karmic main restricted -#deb cdrom:[Ubuntu-Server 9.04 _Jaunty Jackalope_ - Release i386 (20090421.1)]/ jaunty main restricted +#deb cdrom:[Ubuntu-Server 9.04 _Jaunty Jackalope_ - Release i386 (20090421.1)]/ karmic main restricted -deb http://old-releases.ubuntu.com/ubuntu/ jaunty main restricted -deb-src http://old-releases.ubuntu.com/ubuntu/ jaunty main restricted +deb http://old-releases.ubuntu.com/ubuntu/ karmic main restricted +deb-src http://old-releases.ubuntu.com/ubuntu/ karmic main restricted -deb http://old-releases.ubuntu.com/ubuntu/ jaunty-updates main restricted -deb-src http://old-releases.ubuntu.com/ubuntu/ jaunty-updates main restricted +deb http://old-releases.ubuntu.com/ubuntu/ karmic-updates main restricted +deb-src http://old-releases.ubuntu.com/ubuntu/ karmic-updates main restricted -deb http://old-releases.ubuntu.com/ubuntu/ jaunty universe -deb-src http://old-releases.ubuntu.com/ubuntu/ jaunty universe -deb http://old-releases.ubuntu.com/ubuntu/ jaunty-updates universe -deb-src http://old-releases.ubuntu.com/ubuntu/ jaunty-updates universe +deb http://old-releases.ubuntu.com/ubuntu/ karmic universe +deb-src http://old-releases.ubuntu.com/ubuntu/ karmic universe +deb http://old-releases.ubuntu.com/ubuntu/ karmic-updates universe +deb-src http://old-releases.ubuntu.com/ubuntu/ karmic-updates universe -deb http://old-releases.ubuntu.com/ubuntu/ jaunty multiverse -deb-src http://old-releases.ubuntu.com/ubuntu/ jaunty multiverse -deb http://old-releases.ubuntu.com/ubuntu/ jaunty-updates multiverse -deb-src http://old-releases.ubuntu.com/ubuntu/ jaunty-updates multiverse +deb http://old-releases.ubuntu.com/ubuntu/ karmic multiverse +deb-src http://old-releases.ubuntu.com/ubuntu/ karmic multiverse +deb http://old-releases.ubuntu.com/ubuntu/ karmic-updates multiverse +deb-src http://old-releases.ubuntu.com/ubuntu/ karmic-updates multiverse -# deb http://jp.archive.ubuntu.com/ubuntu/ jaunty-backports main restricted universe multiverse -# deb-src http://jp.archive.ubuntu.com/ubuntu/ jaunty-backports main restricted universe multiverse +# deb http://jp.archive.ubuntu.com/ubuntu/ karmic-backports main restricted universe multiverse +# deb-src http://jp.archive.ubuntu.com/ubuntu/ karmic-backports main restricted universe multiverse -# deb http://archive.canonical.com/ubuntu jaunty partner -# deb-src http://archive.canonical.com/ubuntu jaunty partner +# deb http://archive.canonical.com/ubuntu karmic partner +# deb-src http://archive.canonical.com/ubuntu karmic partner -deb http://old-releases.ubuntu.com/ubuntu jaunty-security main restricted -deb-src http://old-releases.ubuntu.com/ubuntu jaunty-security main restricted -deb http://old-releases.ubuntu.com/ubuntu jaunty-security universe -deb-src http://old-releases.ubuntu.com/ubuntu jaunty-security universe -deb http://old-releases.ubuntu.com/ubuntu jaunty-security multiverse -deb-src http://old-releases.ubuntu.com/ubuntu jaunty-security multiverse +deb http://old-releases.ubuntu.com/ubuntu karmic-security main restricted +deb-src http://old-releases.ubuntu.com/ubuntu karmic-security main restricted +deb http://old-releases.ubuntu.com/ubuntu karmic-security universe +deb-src http://old-releases.ubuntu.com/ubuntu karmic-security universe +deb http://old-releases.ubuntu.com/ubuntu karmic-security multiverse +deb-src http://old-releases.ubuntu.com/ubuntu karmic-security multiverse $