Learn the DD command. This post contains comprehensive documentation with examples for one of the most useful Linux/UNIX/Windows commands: dd.
Dd is a bit-stream duplicator. If you have questions, post them. The latest addition, How To Encrypt an 8.0 GB SDHC MicroSD Card was on 06-19-2011. First Time visitors please reply. How To Encrypt an 8.0 GB SDHC MicroSD Card Put the card into an USB adapter. Code: ls /dev/sd* /dev/sdb /dev/sdb1 Write random data to the drive: dd if=/dev/urandom of=/dev/sdb bs=4k /dev/sdb is only an example. apt-get install cryptsetup Learn to use parted, or I quit! Cryptsetup --verbose --verify-passphrase luksFormat /dev/sdb1 Open the encrypted device: cryptsetup luksOpen /dev/sdb1 vol_1 Create a filesystem: mkfs.xfs -imaxpct=3 /dev/mapper/vol_1 Mount: mkdir /AES_Drive && mount /dev/mapper/vol_1 /AES_Drive Umount: umount /AES_Drive && cryptsetup luksClose /dev/mapper/vol_1 Just a footnote, Laptops that went to sleep with the encrypted volume open, may wake up with it open! Warning!! #! And so on. Again. Linux Backup: Hard Disk Clone with "dd" Most of Windows users may know "Norton Ghost".
Norton Ghost is a backup software for hard disks. It can backup a whole hard disk or a partition to an image file. Also, Norton Ghost can copy all the contents from a hard disk to another exactly. However, Norton Ghost is a Windows software, users on other operating system (such as Linux) can not enjoy its powerful function. Fortunately, most of Unix/Linux operating system provides a command line whose function is similar to Norton Ghost, it is called "dd". In fact, "dd" is much powerful than Norton Ghost. Hard Disk Clone Suppose you have a 40GB hard disk and a removable hard disk whose capacity is 60GB, and you want to backup all the files from the hard disk to the removable disk. Dd if=/dev/sda of=/dev/sdb Here, if=... sets the source and of=... sets the destination. Notice: to execute "dd" you should login as "root" or switch to "root" using "su" command.
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