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Old 01-01-2013, 08:27 AM   #1
Registered: Mar 2010
Location: las vegas, nv
Distribution: debian etch, kubuntu, mac osx 10.51, vista
Posts: 65

Rep: Reputation: 15
Cool is this cryptsetup command okay to run as root?


i am new to encrypted disks and so forth.

i have a new kubuntu 12.10 install i have setup with an encrypted volume.

i am trying to backup the binary luks header file as a first exercise working with my encrypted disk. this is the command line i used...

alonzo@eartha:~$ cryptsetup luksHeaderBackup --header-backup-file ./backup1 /dev/sda1
WARNING!!! Possibly insecure memory. Are you root?
Cannot open device /dev/sda1 for read-only access.
if i put an sudo in front of this will it back up my luks header for /dev/sda1 into backup1?

after reading dm-crypt FAQ i am feeling cautious.

also what is "Possibly insecure memory." about?

please advise.

thank you.
Old 01-03-2013, 09:01 AM   #2
Registered: Feb 2008
Distribution: Fedora,RHEL,Ubuntu
Posts: 661

Rep: Reputation: 66
Originally Posted by oznola View Post

also what is "Possibly insecure memory." about?
Here by this warning , system informing you that is this encryption process some of RAM memory data may be copied to disk . I think you can ignore this warning .



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