1. 更新动态链接器缓存

sudo ldconfig

2. 确认环境变量

echo $LD_LIBRARY_PATH

如果没有包含 /usr/local/lib，可以临时添加：

export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH

或者永久添加到 ~/.bashrc：

echo 'export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH' >> ~/.bashrc
source ~/.bashrc

3. 再次运行程序

roslaunch fast_lio_sam fast_lio_sam.launch