[дрим]

Точно за убунту си има всичко в техния форум
https://askubuntu.com/questions/9427...-8gb-usb-stick

down vote
There are several alternatives, that might work well for this purpose.
Persistent live drive

You can install a persistent live system with a 'casper-rw' partition, where you store the custom data (installed program packages, special files and tweaks). This can be done from an Ubuntu family iso file, when you use the tool mkusb as described in the answer by C.S.Cameron.
You might find it convenient to start from a compressed image file, that is already made to fit an 8 GB USB stick or memory card. See the following link,
Compressed image file with a persistent live system
and scroll down to see all the information about the available systems.
The images expand to 7.8 GB because some USB sticks are undersized (slightly smaller than then nominal size).
Installed system

You can create an installed system in a USB stick pretty much as you install a system into an internal drive, but there are a few things, that you should consider in order to succeed.
When the basic system is installed, you can boot into it, make it up to date and add the custom data (install program packages, special files and tweaks).
You can use the following link and links from it to create such a system from 'scratch',
Install an Ubuntu system to a USB stick
Please notice that 8 GB is not enough for an installed system with standard Ubuntu, but works well with Ubuntu family flavours using light desktop environments and light application programs,

• Lubuntu with the ultra light LXDE
• Xubuntu with the medium light XFCE

You can take a short-cut and clone a mini system, that is already created, and that can boot both in UEFI and BIOS mode. Clone from a compressed image file to the USB stick. The images expand to 7.8 GB because some USB sticks are undersized (slightly smaller than then nominal size). See the following links and links from them,

• A portable installed system, that boots both in UEFI and BIOS mode
• help.ubuntu.com/community/Installation/UEFI-and-BIOS

dd_dus-lxde_16.04-UEFI-n-BIOS_2016-05-07_intel-4-pendrive-7.8GB.img.xz contains a light-weight desktop version with mkusb-dus.
A system likely to work in all the computers of the participants

Please consider the various computers of the participants of the event: UEFI mode and/or BIOS mode; 64-bit and/or 32-bit processors, various graphics chips and wifi chips, new and middle-aged (and maybe old) computers.

• A persistent live system is more portable between computers.
• An installed system can be updated and modified completely and is more stable. But you should avoid proprietary drivers, if you want portability.

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