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在用李东岳老师的openfoam虚拟机中算算例，因为一共20g，磁盘空间不足，我按照网上的虚拟机扩容方法一步接一步在终端试试，然后说虚拟机权限不足，应该怎样给虚拟机扩容啊
直接虚拟机扩充磁盘空间，在Ubuntu里用gparted管理磁盘
https://blog.csdn.net/jwq2011/article/details/54599744
