No network loopback device after security update ubuntu 12.04
I have had similar problem.
My lo
didn't start automatically at boot (after turning off IPv6 via sysctl and rebooting the server).
My first workaround was to start it manually with ifup --force lo
. But after that I had to restart most of my services as they didn't work properly without loopback.
Finally this old forum post helped me to find out the proper and permanent solution:
sudo rm -rf /var/run/network/*
sudo reboot
(Apparently there was some old .lock
file there that prevented the loopback to start properly.)
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quangdog
Updated on September 18, 2022Comments
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quangdog over 1 year
I've had Ubuntu 12.04 on a server for the last several months, with everything working fine. Last night I did an
aptitude update && aptitude safe-upgrade
to bring in all the latest security changes, and now when I boot the server no lo device is created.It brings up the physical ethernet interfaces correctly, and I can ping in and out of the machine on those interfaces, but nothing can connect to anything on either
localhost
or127.0.0.1
.ifconfig
lists onlyeth0
andeth1
.No
lo
at all.Here are the contents of /etc/network/interfaces:
# The loopback network interface auto lo iface lo inet loopback # The primary network interface auto eth0 #NetworkManager#iface eth0 inet dhcp
Where should I be looking to diagnose and fix?
Thanks!
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Tobi about 11 years...me too on 12.04.2. Machine boots fine, but no 'lo' shown by ifconfig. "ifup lo" brings it right up and then all is well (after stop/start of some servers that weren't happy without lo at boot.) You ever figure this out?
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Vinicius Tinti over 10 yearsPlease check your /etc/hosts. serverfault.com/questions/333269/…
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Greg Dubicki about 9 years@quangdog I am pretty sure this has been long resolved/forgotten but in a slight chance it has not been: what is the output of
ifconfig -a
on this machine?
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the-wabbit about 9 yearsNote that ifconfig is deprecated. Use
ip addr show
instead. -
Greg Dubicki about 9 yearsDoesn't work for me. Also tried with --force (which works on interactive shell) but to no avail.
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killthrush almost 9 yearsnice find! never would have thought to look in there.