Ok!!!
I found the problem... this is so stupid it made me laugh (even if i lost my night on this)
It seems that there's another software called "node" (Amateur Packet Radio Node program). I removed that software with sudo apt-get remove node
, reinstalled nodeJS, then sudo npm install bower -g
et voila!!!
so it seems that amateur packet radio people dont get along with web developpers... too bad
Hope this helps someone else
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