I used to create bootable USBs in the following way and it used to work perfectly fine:

  1. sudo mount -o loop /path to iso/ /media/iso

  2. cp -a /media/iso/. /path to usb flash drive/

  3. sudo syslinux -s /dev/sdX

  4. And then renaming the isolinux folder to sylinux and the isolinux.cfg file inside it to syslinux.cfg

But now when I boot from my USB, the ubuntu system boots and hangs on one screen. Everything shows up except the Installation Dialog Box where I have to click the install button.

Please help.

The Ubuntu ISO was created using remastersys by the way.

Edit 1:

And even when I tried to make the USB bootable using usb-creator-gtk, it went till 99%, asked for password to install the BootLoader and then said "Failed to install BootLoader".

  • 1
    Could be a lot of things. Knowing your your PC's tech specs and version of Ubuntu may help others narrow down the possibilities. – Larssend Jul 21 '15 at 12:53

I finally found the correct and stable way for creating custom ubuntu distros.

  1. Clone this Git repo:


  2. Edit the distroshare-ubuntu-imager.config file inside it and change the destination directory of the created ISO if you want.

  3. Run the script inside it using sudo ./distroshare-ubuntu-imager.sh and it will create the ISO for you as specified in the config file.

  4. Use Unetbootin to create bootable USB and VIOLA! You are done!

Now install this Custom Distro by booting through your USB.

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