yuan@localhost:~$ sudo apt-get update &&sudo apt-get dist-upgrade
Hit http://ppa.launchpad.net precise Release.gpg
Hit http://archive.canonical.com precise Release.gpg
Hit http://archive.ubuntu.com precise Release.gpg
Hit http://extras.ubuntu.com precise Release.gpg
Hit http://ppa.launchpad.net precise Release
Hit http://archive.canonical.com precise Release
Hit http://extras.ubuntu.com precise Release
Hit http://archive.ubuntu.com precise Release
Hit http://ppa.launchpad.net precise/main Sources
Hit http://ppa.launchpad.net precise/main i386 Packages
Hit http://extras.ubuntu.com precise/main Sources
Hit http://archive.canonical.com precise/partner i386 Packages
Hit http://archive.ubuntu.com precise/restricted Sources
Ign http://ppa.launchpad.net precise/main TranslationIndex
Hit http://extras.ubuntu.com precise/main i386 Packages
Ign http://archive.canonical.com precise/partner TranslationIndex
Hit http://archive.ubuntu.com precise/main Sources
Ign http://extras.ubuntu.com precise/main TranslationIndex
Hit http://archive.ubuntu.com precise/multiverse Sources
Hit http://archive.ubuntu.com precise/universe Sources
Hit http://archive.ubuntu.com precise/main i386 Packages
Hit http://archive.ubuntu.com precise/restricted i386 Packages
Hit http://archive.ubuntu.com precise/universe i386 Packages
Hit http://archive.ubuntu.com precise/multiverse i386 Packages
Hit http://archive.ubuntu.com precise/main TranslationIndex
Ign http://archive.canonical.com precise/partner Translation-en_US
Ign http://archive.canonical.com precise/partner Translation-en
Hit http://archive.ubuntu.com precise/multiverse TranslationIndex
Ign http://ppa.launchpad.net precise/main Translation-en_US
Ign http://ppa.launchpad.net precise/main Translation-en
Hit http://archive.ubuntu.com precise/restricted TranslationIndex
Hit http://archive.ubuntu.com precise/universe TranslationIndex
Ign http://extras.ubuntu.com precise/main Translation-en_US
Hit http://archive.ubuntu.com precise/main Translation-en
Ign http://extras.ubuntu.com precise/main Translation-en
Hit http://archive.ubuntu.com precise/multiverse Translation-en
Hit http://archive.ubuntu.com precise/restricted Translation-en
Hit http://archive.ubuntu.com precise/universe Translation-en
Reading package lists... Done
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.