As I am not able to carry my laptop, so I carry a persistent installation of Ubuntu on my USB 2.0 16GB pendrive for my linux class.
The problem I face is that when I use Live mode it is fast enough to use Ubuntu. But some command like chmod, chown etc. don't work. Hence I force to use persistence live mode. But speed in the persistence mode is so slow that even Firefox is not opening.
I have tried to use a lightweight distro like Lubuntu, but there is no big difference.
I just want my browser and other tools to work properly. I am creating persistence USB via mkusb.
Best Answer
I think the best solution is to get a really fast USB 3 pendrive. Often the flash memory hardware is limiting the speed, so you should search for a pendrive with documented high performance on both reading and writing. See the following link and links from it,
Installation/FromUSBStick - Notes about speed | Ubuntu Community Help Wiki
I use Sandisk Extreme pendrives for this purpose, and I make persistent live systems in them with mkusb. Please search for current information via the internet in order to find alternative pendrives and methods.
You should also avoid installing too many program packages into the persistent live system. And you must not upgrade the whole system. This will make the system slow, and it might even make the system fail, because it will be choked with too much reading from the 'casper-rw' partition or file.