Impossible to log in after crash while installing Surfer

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http://forums.fedoraforum.org – I have Fedora 15 installed in my PC and I'm experimenting troubles while installing Surfer, a software for the visualization of algebraic surfaces. The situation went like this:Downloaded the .deb package from the Surfer site. Downloaded alien and run it to conver the .deb package to an .rpm one. Tried to install it via rpm and got an error with dependencies: libtiff.so.4 missing. I had a look in /usr/lib and found libtiff.so.3.9.5. Reading some forums I found that a symbolic link Code: # ln -s /usr/lib/libtiff.so.3.9.5 /usr/lib/libtiff.so.4 may work, but it didn't. So, I duplicated (HowTos)