[ns] "nam: no display name and no $DISPLAY environment variable"

[likesea@engineer.com.cn]

  I installed ns-allinone-2.1b6 on the directory "/home/ns/ns-allinone-2.1b6". ns can be run,but when I typed "nam example.nam"to visualize the simulation,I was told "nam: no display name and no $DISPLAY environment variable".(example.nam was in current directory and I already put "/home/ns/ns-allinone-2.1b6/bin" to my PATH environment variable.)  My computer was Cyrix 166+,32M,RedHat6.1,kerner:2.2.12-20. What will I do ? HELP ME ! Email me to "likesea@engineer.com.cn".Thanks a lot.

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