All I want to do is, install ubuntu onto a pendrive, so that I don't need to use my internal HDD. Another motto is to install packages on Ubuntu, in pendrive(so I don't want to use the 'live pendrive' thing)

I installed it on the pendrive, and selected the boot installation to dev/sdd1.
But when I boot the pendrive, it says '`Missing Operating System`'

Also, one more question, can the same pendrive be booted on any other computer?