Clever Geek Handbook

Dd returns resolved permission even with root privileges

I am trying to back up my centos server using dd, but I get permission even though I am logged in as root.

[root@server ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/vzfs              90G   58G   33G  64% /
none                  1.5G  4.0K  1.5G   1% /dev

[root@server ~]# dd if=/dev/vzfs of=/dev/null
dd: opening `/dev/vzfs': Permission denied

I don't know what to do next, please help!

Best,

Julien

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1 answer


It is a virtual file system (container). You cannot access directly, even as root - it is only accessible from the real system that the virtual machine is running on.



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