Problem upgrading Tensorflow under Anaconda

I tried to upgrade tensorflow today. I have a virtualenv for version 2 installed under anaconda 3. If I simply run pip install -U tensorflow I got error like Cannot remove entries from nonexistent file /home/user/dummy/anaconda32/envs/tst/lib/site-pack ages/easy-install.pth It turns out that this appears to be a bug from Ananconda, adding “–ignore-installed” seems to be able…

Virtualbox usb not detected

It is quite annoying that usb does no longer work out of the box for Virtualbox with ubuntu host. The issue seems to affect multiple Linux distros. As of version 5.1.18, it seems that the bug is still not fixed. The workaround is not very complicated. But it is a nuisance nonetheless.   Update: If…

Xournal for presentation

I am using more and more beamer this year. Since I used linux, I used to use evince to display my slides. But in my last class, I would like to write something on the slides and I was not prepared for that. My laptop is a nice good old X230t with a stylus on it….