军哥帮忙看下 操作系统： Ubuntu 12.04 64位 安装lnmp失败

arrsin

licess

Reading state information...
Package cmake 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: Package 'cmake' has no installation candidate

系统源问题，导致依赖包都无法安装，更换个其他源