Zentyal installer uses CD-ROM by default. To make an installation from USB Flash Drive, follow these steps:

1. Use UNetBootin or similar utitlity to make a bootable USB Drive (Note: standard Ubuntu utility in 10.04 and newer has the "vesamenu" bug), using Zentyal CD image (.iso).

2. Copy the Zentyal .iso to the same USB Drive, rename it to something short (like "zen.iso") for less typing later.

3. Load from USB, begin standard installation.

4. When it asks to look for CD-ROM drivers on removable devices, choose "yes"

5. After it fails, start CD-ROM lookup again, this time agree to point it manually.

6. When prompted for path to CD-ROM, Alt-F2 to another terminal

7.

ls /dev

and find your USB drive (if you have one HDD, the USB drive will usually be "sdb" with one partition "sdb1")

8.

mkdir /mnt/somename

(create a directory to mount)

9.

mount /dev/sdb1 /mnt/somename

(in this example USB Drive is sdb1)

10.

ls /mnt/somename

(make sure it shows the contents of your USB Drive)

11. Alt-F1 to your installation, when prompted to enter the CD-ROM device path, instead of

/dev/cdrom

put

/mnt/somename/zen.iso

12. When asked to unmount the USB drive, choosing "yes" won't crash the installation.