UEFI Bootable Pendrive

Create Bootable Pendrive-For UEFI Boot
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# apt-get install p7zip-full
# sgdisk --zap-all /dev/sdb
# sgdisk --new=1:0:0 --typecode=1:ef00 /dev/sdb
# mkfs.vfat -F32 /dev/sdb1


Run the following to check if Disklabel is gpt and Type is EFI System

# parted /dev/sdb
(parted)print
(parted)quit

#

# mount -t vfat /dev/sdb1 /mnt
# 7z x /Data/ISO/ubuntu-16.04-desktop-amd64.iso -o/mnt/

(Note--> no space between "-o" and "/mnt")

Connect Pendrive on  uefi system and Install ubuntu

Note:----->Create EFI boot (/boot/efi)  partition while installing with size "500MB" and  type FAT32 Otherwise grub install will fail so the ubuntu installation also...