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安装kvm，用virt-manager启动时报错如下：
Traceback (most recent call last):
File "/usr/share/virt-manager/virt-manager.py", line 383, in <module>
main()
File "/usr/share/virt-manager/virt-manager.py", line 286, in main
raise gtk_error
RuntimeError: could not open display
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原文地址：http://www.cnblogs.com/liqing1009/p/4181697.html
