I would like to know why is eth0 up by default?

IIRC, this wasn't the case in the past, but I'm not sure.

Here are the messages related to eth0 from /var/log/messages:

Mar 17 22:00:01 xvii kernel: [    1.058264] e1000e 0000:00:19.0 eth0: (PCI 
Express:2.5GT/s:Width x1) 00:24:e8:97:5f:73
Mar 17 22:00:01 xvii kernel: [    1.058267] e1000e 0000:00:19.0 eth0: Intel(R) 
PRO/1000 Network Connection
Mar 17 22:00:01 xvii kernel: [    1.058293] e1000e 0000:00:19.0 eth0: MAC: 7, 
PHY: 8, PBA No: 1004FF-0FF
Mar 17 22:00:20 xvii kernel: [   85.168228] IPv6: ADDRCONF(NETDEV_UP): eth0: 
link is not ready

and there are no eth0 occurrences in the /var/log/boot file.

The reason I ask is because I get spammed by one of my cron scripts
that regularly checks the eth0 speed with ethtool. It is silent when
eth0 is down, which is normally the case when there's no Ethernet
cable plugged in... except since the last boot.

Note that my network setup is based on ifupdown, and I use netplug
to detect when an Ethernet cable is plugged in/out. So, I do *not*
have "auto eth0" in my /etc/network/interfaces file.

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Vincent Lefèvre <vinc...@vinc17.net> - Web: <https://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)


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