The following is the current partitioning on my friend's Ubuntu machine.Here, /dev/sda5 is root file system. This is located on extended file system. I want to add the 80GB ext4 (/dev/sda3) and 250GB unallocated to root (/dev/sda5 - ext4).
I am able to extend only 80GB /dev/sda3. But could not extend /dev/sda5. Even with live cd, I have to delete both /dev/sda5 and /dev/sda2 to extend but that's resulting grub error. How can I achieve it without losing data? 
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Vamshi
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Partitions must be unmounted to work on them from live cd/USB. Best way to not lose data is backup data. Data lost should be expected when working on partitions. – crip659 Dec 04 '20 at 19:34
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yeah, correct. Atleast I want the machine to boot up after changes. – Vamshi Dec 04 '20 at 19:36
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Don't mention Ubuntu version, so after backup if wanting to upgrade just install newer version with partitions you want. – crip659 Dec 04 '20 at 19:43
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2Move /dev/sda3 to the end of the unallocated space. Then grow (resize) /dev/sda2. Then /dev/sda5 can be resized after. – Terrance Dec 04 '20 at 19:50
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1Does this answer your question? How to resize partitions? – karel Dec 06 '20 at 11:08
1 Answers
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You need to do it from live CD(USB) in this order:
- If there are any data on
sda3you want to keep, back them up first. - delete
sda3 - select the extended partition
sda2and grow it's size to the most right. - select
sda5and grow it's size to the most right.
mook765
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