I successfully installed remastersys latest version for precise in Ubuntu 12.04 and created iso by executing backupmode. When installation in final stages I got the following error,

"The username you entered is invalid. Note that usernames must start with a lowercase letter, which can be followed by any combination of numbers and more lower case letters."

After it quit the installation. Can you help me to solve this problem?


  • What user name did you enter? – RobinJ May 27 '12 at 10:54
  • I given user name "koha" password "koha123" in CD. The same username and password entered when installation time from backup iso. In remastersys user was custom, i didnt made any change there. – Vimal Kumar May 28 '12 at 9:20

For images built with dist option (Distributable custom iso) the default user name is custom and password is blank- that is no set password. So if you have installed Precise from a custom made live distributable CD this username and password may work.


I have the problem with remastersys asking for root password during installing the system from live cd. I have spent hours searching for that and finally found it working use remastersys-gtk instead of remastersys-gui

install by sudo apt-get install remastersys-gtk

then on the welcome screen clear the user settings button and click the customization and give your own username instead of custom.

copy the Splash.png to /etc/remastersys/customisolinux/using the command

sudo cp /etc/remastersys/isolinux/splash.png /etc/remastersys/customisolinux/ 

Then Copy your "isolinux.bin" in to /etc/remastersys/customisolinux/

sudo cp /usr/lib/syslinux/isolinux.bin /etc/remastersys/customisolinux/

Then Copy your "vesamenu.c32" in to /etc/remastersys/customisolinux/

sudo cp /usr/lib/syslinux/vesamenu.c32 /etc/remastersys/customisolinux/

copy /etc/remastersys/isolinux/isolinux.cfg.vesamenu to /etc/remastersys/customisolinux/ and rename it to isolinux.cfg

sudo cp /etc/remastersys/isolinux/isolinux.cfg.vesamenu /etc/remastersys/customisolinux/isolinux.cfg

It worked for me. I think it will work for you too.

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