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I'm trying to make a installation usb stick for a equipment we have here. I would like to automate linux installation, because we have a lot of these machines to install.

The machine has a 30GB SSD . I want preseed to use the entire disk to create an ext4 partition (mount point '/') and do not create a swap (it's a SSD, so no swap to avoid more read/write).

I read some blog's and articles on the internet where you define an expert_recipe to partman. But I wasn't able to find and option to say use the whole free space. There's the defaut option for partman but I believe (not sure of that) partman would create a swap partition.

How could I do that? Tell preseed to create a single partition using the entire disk and not create a swap partition ?

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up vote 2 down vote accepted

partman indeed creates swap partitions by default, unless you use the expert option. The following expert_recipe creates a single root partition for the entire disk.

d-i partman-basicfilesystems/no_swap boolean false
d-i partman-auto/expert_recipe string myroot :: 1000 50 -1 ext4 \
     $primary{ } $bootable{ } method{ format } \
     format{ } use_filesystem{ } filesystem{ ext4 } \
     mountpoint{ / } \
d-i partman-auto/choose_recipe select myroot

Line 1 disables the partman warning about a missing swap partition. Lines 2-6 create a single partition with a minimum size of 1000 MB. The -1 indicates the maximum size (infinite), which makes partman grow the partition to the size of the disk.

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I don't even work in that company anymore, but very good to know that. =) – lcguida May 29 '15 at 8:47

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