Chapter 10.4 - Using and encrypted partition
My test environment is not VLM. How to create encrypted partition (Ubuntu 14)?
I've created folder /dev/VG/MYSECRET
Command below is not prompting for a passphrase.
#cryptsetup luksFormat /dev/VG/MYSECRET/
WARNING!
========
This will overwrite data on /dev/VG/MYSECRET/ irrevocably.
Are you sure? (Type uppercase yes): yes
Thanks for advice,
Nick
Comments
-
Hello Nick
You don't create the folder: /dev/VG/MYSECRET
Instead, you start by creating a LUKS container. The container gets created on top of storage device (/dev/sda3 in the example below) or a logical volume (like /dev/mapper/lvname). Say, I had a storage device /dev/sda3, I would:
cryptsetup luksFormat /dev/sda3
luksFormat is followed by luksOpen which creates a luks container for the formatted storage or logical volume: cryptsetup –verbose luksOpen /dev/sda3 c1
luksOpen above creates a device called /dev/mapper/c1 from /dev/sda3
You would then format: mkfs -t ext4 /dev/mapper/c1 and use!
Best Regards
SMK
0 -
Hi SMK,
Thanks for your reply. I've mounted partition image file as /dev/loop3 and tried to create luks container. See the output below:
# df -H
Filesystem Size Used Avail Use% Mounted on
udev 2.0G 8.2k 2.0G 1% /dev
tmpfs 402M 1.1M 401M 1% /run
/dev/sda1 19G 7.1G 11G 40% /
none 4.1k 0 4.1k 0% /sys/fs/cgroup
none 5.3M 0 5.3M 0% /run/lock
none 2.1G 148k 2.1G 1% /run/shm
none 105M 29k 105M 1% /run/user
/dev/loop3 1.1G 1.4M 952M 1% /mnt/mntpoint# cryptsetup luksFormat /dev/loop3
WARNING!
========
This will overwrite data on /dev/loop3 irrevocably.Are you sure? (Type uppercase yes): yes
# cryptsetup --verbose luksOpen /dev/loop3 c1
Device /dev/loop3 is not a valid LUKS device.
Command failed with code 22: Device /dev/loop3 is not a valid LUKS device.Why loop3 still not a valid LUKS device?
0 -
Hi Nick,
As pointed above, /dev/VG/MYSECRET is not a folder, it's a device (a LVM in this case). You also can work with any other non LVM partition. I recommend first to use a normal partition instead a loop device, so you can get some practice and then try with a loop device.
Regards,
Luis.
0 -
I've mounted normal partition as /dev/sdb1, but still not sure how to encrypt it.
/dev/sdb1 1.1G 1.4M 968M 1% /home/student/mydata
Please advise.
Nick
0 -
Hi Nick,
1) Unmount the partition.
2) Then do the following:
$ sudo cryptsetup luksFormat /dev/sdb1
$ sudo cryptsetup luksOpen /dev/sdb1 secret-disk
Then keep following the instructions of the lab.
Regards,
Luis.
0 -
Hello,
While running command luksFormat, it is crucial , once prompted, to type 'yes' in CAPITAL LETTERS otherwise you will get error message.Are you sure? (Type uppercase yes):
0 -
YES, this is true. I remember having it take me a while to figure out and then if I don't do it for a long time remembering to do it again
1
Categories
- All Categories
- 240 LFX Mentorship
- 240 LFX Mentorship: Linux Kernel
- 812 Linux Foundation IT Professional Programs
- 365 Cloud Engineer IT Professional Program
- 183 Advanced Cloud Engineer IT Professional Program
- 82 DevOps Engineer IT Professional Program
- 129 Cloud Native Developer IT Professional Program
- 142 Express Training Courses & Microlearning
- 142 Express Courses - Discussion Forum
- Microlearning - Discussion Forum
- 6.5K Training Courses
- 40 LFC110 Class Forum - Discontinued
- 72 LFC131 Class Forum
- 49 LFD102 Class Forum
- 234 LFD103 Class Forum
- 21 LFD110 Class Forum
- 29 LFD121 Class Forum
- LFD123 Class Forum
- LFD125 Class Forum
- 16 LFD133 Class Forum
- 6 LFD134 Class Forum
- 18 LFD137 Class Forum
- 70 LFD201 Class Forum
- 3 LFD210 Class Forum
- 2 LFD210-CN Class Forum
- 2 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum - Discontinued
- 1 LFD233 Class Forum
- 2 LFD237 Class Forum
- 23 LFD254 Class Forum
- 719 LFD259 Class Forum
- 111 LFD272 Class Forum - Discontinued
- 3 LFD272-JP クラス フォーラム
- 13 LFD273 Class Forum
- 226 LFS101 Class Forum
- 1 LFS111 Class Forum
- 2 LFS112 Class Forum
- 1 LFS116 Class Forum
- 3 LFS118 Class Forum
- LFS120 Class Forum
- 1 LFS142 Class Forum
- 2 LFS144 Class Forum
- 3 LFS145 Class Forum
- 4 LFS146 Class Forum
- 15 LFS148 Class Forum
- 15 LFS151 Class Forum
- 1 LFS157 Class Forum
- 58 LFS158 Class Forum
- LFS158-JP クラス フォーラム
- 4 LFS162 Class Forum
- 1 LFS166 Class Forum
- 2 LFS167 Class Forum
- 3 LFS170 Class Forum
- 1 LFS171 Class Forum
- 1 LFS178 Class Forum
- 2 LFS180 Class Forum
- 1 LFS182 Class Forum
- 3 LFS183 Class Forum
- 30 LFS200 Class Forum
- 737 LFS201 Class Forum - Discontinued
- 2 LFS201-JP クラス フォーラム
- 20 LFS203 Class Forum
- 109 LFS207 Class Forum
- 1 LFS207-DE-Klassenforum
- 2 LFS207-JP クラス フォーラム
- 301 LFS211 Class Forum
- 55 LFS216 Class Forum
- 53 LFS241 Class Forum
- 43 LFS242 Class Forum
- 37 LFS243 Class Forum
- 16 LFS244 Class Forum
- 1 LFS245 Class Forum
- LFS246 Class Forum
- LFS248 Class Forum
- 44 LFS250 Class Forum
- 1 LFS250-JP クラス フォーラム
- LFS251 Class Forum
- 156 LFS253 Class Forum
- LFS254 Class Forum
- 2 LFS255 Class Forum
- 6 LFS256 Class Forum
- 1 LFS257 Class Forum
- 1.3K LFS258 Class Forum
- 9 LFS258-JP クラス フォーラム
- 113 LFS260 Class Forum
- 161 LFS261 Class Forum
- 41 LFS262 Class Forum
- 82 LFS263 Class Forum - Discontinued
- 15 LFS264 Class Forum - Discontinued
- 11 LFS266 Class Forum - Discontinued
- 21 LFS267 Class Forum
- 18 LFS268 Class Forum
- 29 LFS269 Class Forum
- 7 LFS270 Class Forum
- 199 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- 2 LFS147 Class Forum
- LFS274 Class Forum
- 3 LFS281 Class Forum
- 2 LFW111 Class Forum
- 257 LFW211 Class Forum
- 176 LFW212 Class Forum
- 15 SKF100 Class Forum
- SKF200 Class Forum
- 2 SKF201 Class Forum
- 797 Hardware
- 198 Drivers
- 68 I/O Devices
- 37 Monitors
- 96 Multimedia
- 174 Networking
- 91 Printers & Scanners
- 83 Storage
- 761 Linux Distributions
- 82 Debian
- 67 Fedora
- 16 Linux Mint
- 13 Mageia
- 23 openSUSE
- 149 Red Hat Enterprise
- 31 Slackware
- 13 SUSE Enterprise
- 355 Ubuntu
- 463 Linux System Administration
- 39 Cloud Computing
- 71 Command Line/Scripting
- Github systems admin projects
- 91 Linux Security
- 78 Network Management
- 101 System Management
- 46 Web Management
- 55 Mobile Computing
- 18 Android
- 28 Development
- 1.2K New to Linux
- 1K Getting Started with Linux
- 364 Off Topic
- 115 Introductions
- 170 Small Talk
- 26 Study Material
- 518 Programming and Development
- 304 Kernel Development
- 211 Software Development
- 1.1K Software
- 211 Applications
- 180 Command Line
- 3 Compiling/Installing
- 405 Games
- 311 Installation
- 78 All In Program
- 78 All In Forum
Upcoming Training
-
August 20, 2018
Kubernetes Administration (LFS458)
-
August 20, 2018
Linux System Administration (LFS301)
-
August 27, 2018
Open Source Virtualization (LFS462)
-
August 27, 2018
Linux Kernel Debugging and Security (LFD440)