谢谢大家我试过运行的mongo它不运行终于我发现没有我的硬盘中的空间我清空了一些空间，最后重新安装它，安装方式与mongodb doc一样安装，最后重新启动服务器并正在运行。

thank you everyone I tried running mongo it was not running finally I found there was no space in my hard disc I emptied some of the space and finally re installed it the same installation procedure as followed to install as given in mongodb docs finally restarted the server and it is running.

https：//docs.mongodb .org / manual / tutorial / install-mongodb-on-ubuntu