1. Here is a very useful instruction to install FreeNX server on Ubuntu Gusty,
and it works pretty cool! Much much faster than VNC.
2. To list files matches certain pattern in one directory, use the following command:
find . -name "*.c"
This basically find all the c-files in a directory.
Complexity Class of the Week: \(L_2^P\)
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Back in the 90s when I was a young professor at the University of Chicago,
we would have a *Complexity Class of the Week* where I would take some
interes...