1. 之前安装的Cmake不删,下载新版本的Cmake
2. 解压软件包
# cmake可执行性文件
/home/yoyo/360Downloads/cmake-3.21.1-linux-x86_64/bin/cmake
# cmake-gui界面
/home/yoyo/360Downloads/cmake-3.21.1-linux-x86_64/bin/cmake-gui
3. 配置环境变量
gedit ~/.bashrc
# 添加内容,PATH路径根据真实路径
export PATH=/home/yoyo/360Downloads/cmake-3.21.1-linux-x86_64/bin:$PATH
# 更新bashrc
source ~/.bashrc
4. 查看是否安装成功
cmake --version