I run Ubuntu using a live boot from usb flash drive and but I am not able to save files or install any 3rd party software......Is there any way where I can save files on usb drive itself so that when I hook up the usb drive I am able to use all the work I did in the last session ..........


Mkusb will make a Live Persistent install to USB that will retain all of your changes without the need of doing a Full install, Mkusb will do either a MSDOS or GPT install.

It will work on a 4GB or smaller USB drive, a Full install of Ubuntu requires an 8GB drive minimum.

Mkusb creates an iso9660 partition for the OS, a casper-rw partition to install programs and save files and a FAT32 partition that both Linux and Windows can use for data.

See: https://help.ubuntu.com/community/mkusb


One way is to use another installation medium to install Ubuntu to the flash drive as if it were a hard disk. This requires a rather large flash drive, however (32 GB would be recommended, though it would probably work in 16 GB if you don't need to install too much additional software). If you want to use a 16 GB size, you might prefer Lubuntu, which installs fewer and smaller packages.

  • There is no specific portable version of Ubuntu. A live image is portable, as is a full installation. – wjandrea Apr 26 '17 at 22:05
  • A full install onto a cheap 32GB USB drive (lexar actually) was a disaster for me, insanely slow, writing 10-100K/sec and minutes to boot the two times it did boot, then completely corrupted the filesystem. Could've just been a flakey USB drive, but if so the full install & two boots finished it off very quickly. Sticking with booting ISO's (from grub or using a program like C.S.Cameron recommends) with a persistent file/partition seems much easier on drives – Xen2050 Sep 7 '17 at 6:36

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