Doubt regarding lab 44.4
When working on lab 44.4, precisely the table restoring part (exercise 4), I could not do it because my root directory was in the sda disk. Thus, I could not mount /dev/sda without the backup file information. Only after creating a backup copy of the gpt table in a USB driver was I able to restore the system. In this regard, my doubt is:
- Is the root directory in another driver or inside /dev/sda in the lab's exercise? In the latter case, how can I restore the partition table information since I can't mount the disk without this information? For this lab, I used the gpt scheme.
Thanks in advance
Comments
-
Hi @iri36, are you working on a bare metal system or on a VM? For GPT systems there is a note in the PDF for that lab:
The following instructions for an MBR system. if you have GPT you need to use sgdisk with the --backup-file and --load-backup options as discussed in the partitioning chapter
Regards,
Luis.1 -
Hi @luisviveropena,
I'm working with a VM with Ubuntu 20.04 in VirtualBox. I used sgdisk with --backup and --load-backup as suggested in the lab. My problem was that the backup file was created in the /home dir which was in the dev/sda and after deleting the partition table, I could not mount the device and therefore could not access my backup file. BTW, in the GPT system, how do I delete the GPT table? I used "sgdisk --clear /dev/sda" but I'm not sure if this is the right way to do it. Thanks!
0 -
Hi @iri36,
I'm working with a VM with Ubuntu 20.04 in VirtualBox. I used sgdisk with --backup and --load-backup as suggested in the lab. My problem was that the backup file was created in the /home dir which was in the dev/sda and after deleting the partition table, I could not mount the device and therefore could not access my backup file.
Oh, hehehe, I see. So you need to save the backup file to another place and partition. If /tmp is a separated partition, you can put it there, or to any other partition that can work for this purpose.
BTW, in the GPT system, how do I delete the GPT table? I used "sgdisk --clear /dev/sda" but I'm not sure if this is the right way to do it. Thanks!
Per the man page you are correct:
-o, --clear
Clear out all partition data. This includes GPT header data, all partition definitions, and the protective MBR.Regards,
Luis.1 -
Thanks, @luisviveropena!!!
1 -
It's a pleasure @iri36!!
0
Categories
- All Categories
- 60 LFX Mentorship
- 113 LFX Mentorship: Linux Kernel
- 618 Linux Foundation IT Professional Programs
- 321 Cloud Engineer IT Professional Program
- 142 Advanced Cloud Engineer IT Professional Program
- 55 DevOps Engineer IT Professional Program
- 68 Cloud Native Developer IT Professional Program
- 6 Express Training Courses
- 6 Express Courses - Discussion Forum
- 2.3K Training Courses
- 19 LFC110 Class Forum - Discontinued
- 9 LFC131 Class Forum
- 31 LFD102 Class Forum
- 175 LFD103 Class Forum
- 22 LFD121 Class Forum
- 2 LFD137 Class Forum
- 61 LFD201 Class Forum
- 2 LFD210 Class Forum
- 1 LFD210-CN Class Forum
- 1 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum - Discontinued
- LFD237 Class Forum
- 23 LFD254 Class Forum
- 653 LFD259 Class Forum
- 108 LFD272 Class Forum
- 1 LFD272-JP クラス フォーラム
- 4 LFD273 Class Forum
- 2 LFS145 Class Forum
- 28 LFS200 Class Forum
- 740 LFS201 Class Forum - Discontinued
- 1 LFS201-JP クラス フォーラム
- 12 LFS203 Class Forum
- 92 LFS207 Class Forum
- 301 LFS211 Class Forum
- 54 LFS216 Class Forum
- 47 LFS241 Class Forum
- 41 LFS242 Class Forum
- 37 LFS243 Class Forum
- 12 LFS244 Class Forum
- 41 LFS250 Class Forum
- 1 LFS250-JP クラス フォーラム
- LFS251 Class Forum
- 142 LFS253 Class Forum
- LFS254 Class Forum
- LFS255 Class Forum
- LFS256 Class Forum
- LFS257 Class Forum
- 1.2K LFS258 Class Forum
- 10 LFS258-JP クラス フォーラム
- 106 LFS260 Class Forum
- 145 LFS261 Class Forum
- 39 LFS262 Class Forum
- 83 LFS263 Class Forum - Discontinued
- 15 LFS264 Class Forum - Discontinued
- 11 LFS266 Class Forum - Discontinued
- 20 LFS267 Class Forum
- 18 LFS268 Class Forum
- 26 LFS269 Class Forum
- 204 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- LFS274 Class Forum
- 3 LFS281 Class Forum
- 249 LFW211 Class Forum
- 177 LFW212 Class Forum
- 9 SKF100 Class Forum
- SKF200 Class Forum
- 907 Hardware
- 220 Drivers
- 74 I/O Devices
- 44 Monitors
- 116 Multimedia
- 210 Networking
- 102 Printers & Scanners
- 86 Storage
- 764 Linux Distributions
- 88 Debian
- 66 Fedora
- 15 Linux Mint
- 13 Mageia
- 24 openSUSE
- 143 Red Hat Enterprise
- 33 Slackware
- 13 SUSE Enterprise
- 357 Ubuntu
- 482 Linux System Administration
- 40 Cloud Computing
- 70 Command Line/Scripting
- Github systems admin projects
- 95 Linux Security
- 80 Network Management
- 108 System Management
- 51 Web Management
- 72 Mobile Computing
- 25 Android
- 32 Development
- 1.2K New to Linux
- 1.1K Getting Started with Linux
- 545 Off Topic
- 132 Introductions
- 223 Small Talk
- 22 Study Material
- 831 Programming and Development
- 282 Kernel Development
- 515 Software Development
- 974 Software
- 260 Applications
- 185 Command Line
- 3 Compiling/Installing
- 119 Games
- 318 Installation
- 65 All In Program
- 65 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)