Linux 新手在这里。我最近订购了我的第一个（非托管）VPS 运行 Ubuntu 10.04。我成功地通过 SSH 连接 (PuTTY) 升级到 12.04，但现在要升级到 12.10 版本时遇到了一些麻烦。这正是我所做的：
sudo apt-get update && sudo apt-get upgrade && sudo apt-get dist-upgrade
sudo reboot
sudo do-release-upgrade -c
Checking for a new Ubuntu release.
New release '12.10' available.
Run 'do-release-upgrade' to upgrade to it.
sudo do-release-upgrade
几秒钟后，由于找不到“/var/run/utmp”，安装过程停止：
root@vm3593:~# sudo do-release-upgrade
Checking for a new Ubuntu release
Get:1 Upgrade tool signature [198 B]
Get:2 Upgrade tool [1200 kB]
Fetched 1200 kB in 0s (0 B/s)
authenticate 'quantal.tar.gz' against 'quantal.tar.gz.gpg'
extracting 'quantal.tar.gz' …