The recommended way is to opt for "custom partitioning", to select the Linux partition to be overwritten and to mark it as "formatted", "ext4" and "/".
About the extended partition, there's 4 primary... if you need more, you've got one of them acting as a group. It's nothing specific to this installer, it's the way the PC architecture was designed.
The recommended way is to opt for "custom partitioning", to select the Linux partition to be overwritten and to mark it as "formatted", "ext4" and "/".
About the extended partition, there's 4 primary... if you need more, you've got one of them acting as a group. It's nothing specific to this installer, it's the way the PC architecture was designed.