我有一个由 QuickWeb.co.nz 托管的 VPS，运行 Ubuntu 12.04 OpenVZ。
我下载并解压了 OpenSwan，但仍然无法安装：
root@vps:~/openswan-2.6.35# apt-get install openswan xl2tpd ppp
Reading package lists... Done
Building dependency tree... Done
Package ppp is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Unable to locate package openswan
E: Unable to locate package xl2tpd
E: Package 'ppp' has no installation candidate
我承认自己是个新手，我正在边学边做。感谢您的耐心和帮助！！:)
答案1
尝试apt-get update先更新 apt 的软件包列表，然后再试一次