chroot Warning: cannot open /proc/net/dev (No such file or directory). Limited output.

# ifconfigWarning: cannot open /proc/net/dev (No such file or directory). Limited out

Thread: A network problem about ubuntu chroot into CentOS

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1. September 28th, 2011#1

   samtai 

   First Cup of Ubuntu

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   Sep 2011

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   [SOLVED]A network problem about ubuntu chroot into CentOS

   I have create a qemu image and installed CentOS in this img,
   then I mount the img in /mnt/centos/ ,and chroot into CentOS successfully.
   All the command work fine in CentOS, but I can not ping google.com, so I type "ifconfig", it display like the following:
   

   Code:

   # ifconfigWarning: cannot open /proc/net/dev (No such file or directory). Limited output.Warning: cannot open /proc/net/dev (No such file or directory). Limited output.eth1      Link encap:Ethernet  HWaddr 6C:F0:49:E9:0E:65            inet addr:192.168.11.4  Bcast:192.168.11.255  Mask:255.255.255.0          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1          Interrupt:45 Base address:0xe000 Warning: cannot open /proc/net/dev (No such file or directory). Limited output.lo        Link encap:Local Loopback            inet addr:127.0.0.1  Mask:255.0.0.0          UP LOOPBACK RUNNING  MTU:16436  Metric:1

   I cd to /proc , it is empty. Am I mount the root file system incorrect?
   
   Anyone know how to config the chroot network and solve this problem?

   Last edited by samtai; September 28th, 2011 at 11:30 AM. Reason: solved the problem

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2. September 28th, 2011#2

   samtai 

   First Cup of Ubuntu

   Join Date

   Sep 2011

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   2

   Re: A network problem about ubuntu chroot into CentOS

   I have find a easy way to solve my problem,
   I just need to mount my Ubuntu's /proc to the chroot directory.
   

   Code:

   sudo mount --bind /proc /mnt/centos/proc

   But the network still not working, I need to do one more thing, when chroot into CentOS, type:
   

   Code:

   dhclient eth1

   Then, I can ping google.com and use the yum command.
   
   For more information, go to http://geek.co.il/wp/2010/03/14/how-...ent-for-centos
   I found the solution on this website.

   Last edited by samtai; September 28th, 2011 at 11:45 AM.

3. 我的解决办法 mount --bind /proc ./proc/

4. deb http://ports.ubuntu.com/ubuntu-ports/ oneiric-security universe maindeb http://ports.ubuntu.com/ubuntu-ports oneiric-updates universe maindeb http://ports.ubuntu.com/ubuntu-ports oneiric main universe