"su -" in terminal hangs

[j.halifax2 at seznam.cz]

Hi All,



I use FC18 box (3.9.4-200.fc18.x86_64) for ssh-ing to other boxes. 

It was working normally without rebooting for months but now when 

I tried to put "su -" in the terminal, it hangs.




I haven't found any help in Internet.




Any idea? Please advise...




Thank you so much.

jh



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