Error Creating Filesystem Dm Crypt
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Introduction Easy setup using disk utility Creating a new encrypted partition Encrypting an existing partition Using your encrypted partition Expert setup using command line only Install cryptsetup Identifying Attached Storage Stronger Encryption Preparation (optional) Filesystem Preparation Filesystem Encryption Creating a Filesystem Mount cryptsetup luksformat Encrypted Filesystem Sources & credits Introduction Encrypting removable devices (USB flash drives, external cryptsetup ubuntu hard drives, etc) provides a method to guarantee data security in the event of loss, theft or confiscation. When cryptsetup keyfile backing up personal information onto external storage, encryption is a recommended preparation for the filesystem. Recent versions of Gnome will now support encrypted filesystems on removable storage by prompting the user for the cryptsetup arch passphrase when the device is automounted. Easy setup using disk utility Applicable to Ubuntu 10.04 and probably to newer releases You must install the package cryptsetup. Install the ''cryptsetup'' package Disk Utility is included by default (or can easily be installed). It should be in System - Administration - Disk utility (or type 'palimpsest' in terminal). Install the ''gnome-disk-utility'' package (if missing) Partitioning is dangerous! BACK
Dm-crypt Luks
UP everything and BE SURE to format the correct drive. Creating a new encrypted partition In brief, the steps are (please improve...): Start Disk Utility Make SURE you identify the proper drive in the left hand panel If needed, create empty space on the disk by resizing/deleting partitions (CAREFUL!) In the "Volumes" graphic overview, click the appropriate empty block Click Create partition to create the partition to be encrypted Check Encrypt underlying device They will then prompt you for a password. Chose a decent password - your encryption will only be as strong as your password. Don't use your birthdate, or your IP, or your address. It is probably also safer NOT to store the password - choose the option "Forget password immediately". Encrypting an existing partition Make a backup of your data on the partition, then unmount it In Disk Utility, select the partition to encrypt (NOTE: this process will destroy all data on the partition!) Click the gear icon under the partition and choose Format... Select the type Encrypted, compatible with Linux systems (LUKS + Ext4) Enter a partition name and passphrase For security, if you have have existing data in this partit
1 Preparation 2 Cryptsetup usage 2.1 Cryptsetup passphrases and keys 3 Encryption options with dm-crypt 3.1 Encryption options for LUKS mode 3.2 Encryption options for plain mode 4 Encrypting devices with
Man Cryptsetup
cryptsetup 4.1 Encrypting devices with LUKS mode 4.1.1 Formatting LUKS partitions 4.1.1.1 aes-xts-plain64 Using LUKS to format partitions with a keyfile 4.1.2 Unlocking/Mapping LUKS partitions with the device mapper 4.2 Encrypting cryptsetup benchmark devices with plain mode 5 Cryptsetup actions specific for LUKS 5.1 Key management 5.1.1 Adding LUKS keys 5.1.2 Removing LUKS keys 5.2 Backup and restore 5.2.1 Backup using cryptsetup 5.2.2 https://help.ubuntu.com/community/EncryptedFilesystemsOnRemovableStorage Restore using cryptsetup 5.2.3 Manual backup and restore 5.3 Re-encrypting devices 5.3.1 Encrypt an unencrypted filesystem 5.3.2 Re-encrypting an existing LUKS partition 6 Keyfiles 6.1 Types of keyfiles 6.1.1 passphrase 6.1.2 randomtext 6.1.3 binary 6.2 Creating a keyfile with random characters 6.2.1 Storing the keyfile on a filesystem 6.2.1.1 Securely overwriting stored keyfiles 6.2.2 Storing the keyfile in tmpfs 6.3 Configuring https://wiki.archlinux.org/index.php/Dm-crypt/Device_encryption LUKS to make use of the keyfile 6.4 Unlocking a secondary partition at boot 6.5 Unlocking the root partition at boot 6.5.1 With a keyfile stored on an external media 6.5.1.1 Configuring mkinitcpio 6.5.1.2 Configuring the kernel parameters 6.5.2 With a keyfile embedded in the initramfs Preparation Before using cryptsetup, always make sure the dm-crypt kernel module is loaded. Cryptsetup usage Cryptsetup is the command line tool to interface with dm-crypt for creating, accessing and managing encrypted devices. The tool was later expanded to support different encryption types that rely on the Linux kernel device-mapper and the cryptographic modules. The most notable expansion was for the Linux Unified Key Setup (LUKS) extension, which stores all of the needed setup information for dm-crypt on the disk itself and abstracts partition and key management in an attempt to improve ease of use. Devices accessed via the device-mapper are called blockdevices. For further information see Disk encryption#Block device encryption. The tool is used as follows: # cryptsetup
In submit Tutorials Questions Projects Meetups Main Site logo-horizontal DigitalOcean Community Menu Tutorials Questions Projects Meetups Main Site Sign Up Log In https://www.digitalocean.com/community/tutorials/how-to-use-dm-crypt-to-create-an-encrypted-volume-on-an-ubuntu-vps submit View All Results By: Justin Ellingwood Subscribe Subscribed Share Contents Contents We hope you find this tutorial helpful. In addition to guides like this one, we provide simple cloud infrastructure for developers. Learn more → 10 How To Use DM-Crypt to Create an Encrypted Volume on an Ubuntu VPS Posted Apr 7, 2014 94.2k views Security Ubuntu Introduction Security error creating should be a primary concern for any kind of data that stored on an internet accessible computer. While every storage provider should take care to secure data from their end, this only goes so far as unauthorized access can happen through software flaws of services on your server, social engineering, and many other avenues. In short, you should take error creating filesystem ownership of the encryption and security of any data that you cannot afford to fall into the wrong hands. There are many ways to encrypt content on a Linux system. Many of these options rely on encrypting separate partitions, devices, or filesystems. This may not be an option if you are dealing with a system like a VPS. However, there are other options, such as creating a file that operates as a device in order to store encrypted data. In this guide, we will use the dm-crypt tools to create a large encrypted file that can be used to store our sensitive data. We can then mount this file as if it were a regular partition. We will be demonstrating this on an Ubuntu 12.04 VPS instance, but similar procedures should work for other distributions. Basic Idea The dm-crypt is a kernel-level encryption mechanism which offers transparent disk encryption. This means that the files are immediately available without any additional interaction after mounting. While most encryption schemes rely on encrypting things at the partition level, we ca