Using a File as a Disk Partition Image

olivieraf

hi!

i encountered a problem when trying this lab 17.1 on the VM...thus is it impossible to create loop partition in a Virtual Machine?

i got this error:

mount: /tmp/imagefile: failed to setup loop device: No such file or directory

regards,

olivieraf

i re-take the same labs with a RHEL Virtual Machine with success!

maybe the problem is about the Centos VM i get from lftraining

 

coop

not enough information.  The labs were developed on VMs do that is not a problem.  If you want help, post the actual commands you used and the actual output.

coop

I did not see your successful comment.  One thing to check is what kernel you are running.  Other that that it should make no difference whether it is RHEL and CentOS

olivieraf

#uname -a

Linux CentOS7 3.10.0-123.el7.x86_64

#dd if=/dev/zero of=imagefile bs=1M count=512

#mkfs.ext4 imagefile

#mkdir mntpoint

#mount -o loop imagefile mntpoint/

and for the last commands i got this output:

mount: /imagefile: failed to setup loop device: No such file or directory

 

#losetup -f    give the following output:

/dev/loop0

#losetup /dev/loop1 imagefile

losetup: /imagefile: failed to set up loop device: No such file or directory

that is the issue!

coop

I don't have to debug on a centos VM right now, tbut the message is tell ing you it can't find /imagesfile, not just imagefile.  So maybe you are sitting in / instead of wherever you made the imagefile?  Try giving the full path to the iamge file like /tmp/imagesfile etc.