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
- 50 LFX Mentorship
- 103 LFX Mentorship: Linux Kernel
- 553 Linux Foundation Boot Camps
- 296 Cloud Engineer Boot Camp
- 119 Advanced Cloud Engineer Boot Camp
- 52 DevOps Engineer Boot Camp
- 53 Cloud Native Developer Boot Camp
- 4 Express Training Courses
- 4 Express Courses - Discussion Forum
- 1.9K Training Courses
- 18 LFC110 Class Forum
- 6 LFC131 Class Forum
- 25 LFD102 Class Forum
- 150 LFD103 Class Forum
- 17 LFD121 Class Forum
- LFD137 Class Forum
- 61 LFD201 Class Forum
- LFD210 Class Forum
- LFD210-CN Class Forum
- 1 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum
- LFD237 Class Forum
- 23 LFD254 Class Forum
- 598 LFD259 Class Forum
- 102 LFD272 Class Forum
- 1 LFD272-JP クラス フォーラム
- LFD273 Class Forum
- 2 LFS145 Class Forum
- 24 LFS200 Class Forum
- 739 LFS201 Class Forum
- 1 LFS201-JP クラス フォーラム
- 3 LFS203 Class Forum
- 69 LFS207 Class Forum
- 300 LFS211 Class Forum
- 54 LFS216 Class Forum
- 47 LFS241 Class Forum
- 41 LFS242 Class Forum
- 37 LFS243 Class Forum
- 11 LFS244 Class Forum
- 34 LFS250 Class Forum
- 1 LFS250-JP クラス フォーラム
- LFS251 Class Forum
- 140 LFS253 Class Forum
- LFS254 Class Forum
- 1K LFS258 Class Forum
- 10 LFS258-JP クラス フォーラム
- 92 LFS260 Class Forum
- 130 LFS261 Class Forum
- 32 LFS262 Class Forum
- 79 LFS263 Class Forum
- 15 LFS264 Class Forum
- 11 LFS266 Class Forum
- 17 LFS267 Class Forum
- 17 LFS268 Class Forum
- 23 LFS269 Class Forum
- 203 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- LFS281 Class Forum
- 221 LFW211 Class Forum
- 167 LFW212 Class Forum
- SKF100 Class Forum
- 902 Hardware
- 219 Drivers
- 74 I/O Devices
- 44 Monitors
- 115 Multimedia
- 209 Networking
- 101 Printers & Scanners
- 85 Storage
- 761 Linux Distributions
- 88 Debian
- 66 Fedora
- 15 Linux Mint
- 13 Mageia
- 24 openSUSE
- 141 Red Hat Enterprise
- 33 Slackware
- 13 SUSE Enterprise
- 356 Ubuntu
- 477 Linux System Administration
- 41 Cloud Computing
- 69 Command Line/Scripting
- Github systems admin projects
- 95 Linux Security
- 77 Network Management
- 108 System Management
- 49 Web Management
- 66 Mobile Computing
- 23 Android
- 29 Development
- 1.2K New to Linux
- 1.1K Getting Started with Linux
- 536 Off Topic
- 131 Introductions
- 216 Small Talk
- 21 Study Material
- 817 Programming and Development
- 275 Kernel Development
- 508 Software Development
- 928 Software
- 260 Applications
- 184 Command Line
- 3 Compiling/Installing
- 76 Games
- 316 Installation
- 59 All In Program
- 59 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)