Ultimate Boot CD might be a bit more popular than blivet-gui. We know about 1 link to it since March 2021 and only 1 link to blivet-gui. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Follow the links at https://github.com/storaged-project/blivet-gui for blivet-gui. It will let you configure the lvm and format the filesystem. (including btrfs) It also supports LUKs encryption in the gui. Source: over 2 years ago
For convenience: Ultimate Boot CD (UBCD) includes a version that's outdated, but should be fine with older hardware. Source: over 2 years ago
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