whether my system is 32 bit o 64 bit?

[Linux Tyro]

hi,

  How could I know if I am running a 64 bit version or 32 bit, any
command... or like that?

-- 
Two atoms are walking along. Suddenly, one stops. The other says, "What's
wrong?" "I've lost an electron." "Are you sure?" "I'm positive!"

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Ubuntu LTS is good <http://sites.google.com/site/whyilikeubuntu/>!
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