Couldn‘t connect to session bus: Did not receive a reply. Possible causes include: the remote applic
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运行进程间通信dbus服务程序和客户程序时报错：
Couldn't connect to session bus: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
原因：
不能在root用户下运行，（可能这创建的是session dbus的原因，而不是system dbus），用exit退出root用户到普通用户下运行就好了
参考文章：Couldn’t connect to session bus问题的解决
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