I am using ubuntu18.04 environment under the virtual machine installation,
Ubuntu version of the corresponding to the corresponding relative ros version, otherwise it is not on,
Suggest roswiki go up by steps to complete installation, to choose their own steps to install inside the wiki environment, image download source well advised to choose a wiki recommend domestic sources, such as the choice of tsinghua mirror source, before the start of the input code, need to get ubuntu software update server, you can choose tsinghua server, huawei server, ali server, and the complete change after change the server update,
So, started from the ros you choose image source (such as tsinghua mirror) began to input from a terminal, you choose domestic server, download quickly, step by step according to the standard, you will have the biggest trouble, is the problem of ros initialization timeout, advice in hot by mobile phone, other steps would come along