Marco ! carajo, the error is corrected..
I realized that after boot..that I don't have any "lo" interface up! (with ifconfig)
Wierd!
I checked the file : /etc/network/interfaces, and it was ok :
> auto lo eth0
> iface lo inet loopback
> iface eth0 inet dhcp
It seems that /etc/init.d/networking start does not perform well..
After boot..only the eth0 is up.
And sometimes, nothing..In those cases..I was performing a :
Musix -->Programs -->Knoppix -->Net-->network card configuration.
Then, surprising, again only eth0 were up. Still no loopback.
So I checked the /etc/init.d/networking script..and saw that the restart option does not make a ifdown of the loopback..
I checked the execution of /etc/init.d/networking restart , and SURPRISING, still no loopback after..I suppose that Musix -->Programs -->Knoppix -->Net-->network card configuration use that script..
So I executed myself an : ifdown -a and after an ifup -a..
And : WOUHOU..eth0 and loopback are there...
!!! AND ALL APPS ARE WORKING !!!!
Hmmm..for now, I'll put ifdown and ifup in an init script..so I can finally play with Musix.
Do you have any idea for the strange behavior?
Thank you for the strace tip !
Julien.