I removed the symbolic link and then recreated it but that did not seem to work.
I also reinstalled gsl-bin using apt-get but that did not seem to help either.
Below is the output from those 4 commands. Your help will be much appreciated.
~> ls -l /usr/lib/x86_64-linux-gnu/libgsl.*
lrwxrwxrwx 1 root root 16 Dec 7 2015 /usr/lib/x86_64-linux-gnu/libgsl.so.19 -> libgsl.so.19.0.0
-rw-r--r-- 1 root root 2352808 Dec 7 2015 /usr/lib/x86_64-linux-gnu/libgsl.so.19.0.0
~> file /usr/lib/x86_64-linux-gnu/libgsl.*
/usr/lib/x86_64-linux-gnu/libgsl.so.19: symbolic link to libgsl.so.19.0.0
/usr/lib/x86_64-linux-gnu/libgsl.so.19.0.0: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, BuildID[sha1]=df4f3d1f505c3f6eff70f86f04fc46bb2027614d, stripped
~> ls -l /usr/lib/libgsl.*
lrwxrwxrwx 1 root root 35 Oct 21 12:40 /usr/lib/libgsl.so.0 -> /usr/lib/x86_64-linux-gnu/libgsl.so
~> file /usr/lib/libgsl.*
/usr/lib/libgsl.so.0: broken symbolic link to /usr/lib/x86_64-linux-gnu/libgsl.so