I am currently running Ubuntu 18, "try without installing" option. I am trying to install it. I have partitioned one of my hard disks in order to get a place to install.

When I try to continue it says "root file system not defined, please fix it in the partition menu".

What am I doing wrong?

0

1 Answer

The main Linux partition must be mounted as /, it must hold a proper file system (e.g. ext4) from the very beginning. It may be the only partition used by Linux or there may be others mounted e.g. as /boot, /var, /home, etc.

While /boot (or /var etc.) may be a mount point for a separate partition or just a normal directory inside /, / itself as a mount point is mandatory. You need to assign / to some partition and create (format) a file system there (if not already created).

Example:

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