Package cmake is not available, but is referred to by another package.

inux环境下安装Cmake报错：

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

尝试了更换下载源，清华的，中科大的，阿里的都不行，最后在nvidia发现了一个方法，尝试了一下成功了，特此记录下：

首先去cmake官网下载压缩包，版本可以自己选 

接下来解压

tar zxvf cmake-3.21.1.tar.gz

然后进入文件夹

cd cmake-3.21.1

解压后有个bootstrap文件 

 之后执行bootstrap文件 ，接下来几步都比较耗时间，在执行前要给相应的执行权限

chmod +x bootstrap

sudo ./bootstrap

然后make编译安装

sudo make

sudo make install

安装完成后查看cmake版本，如果对应的上就成功了 

cmake --version

 参照原文来自：

Can`t install "cmake" - Jetson & Embedded Systems / Jetson Nano - NVIDIA Developer Forums