And .. well, this is not recommended but I did it anyway. I renamed the /usr/bin/gdb to gdb.orig and created a symlink /usr/bin/gdb to point to /usr/local/bin/gdb. Why? I use several users when debugging/pwning something and I didn't want to setup the profile for each user. I'm lazy that way. Also the 'user experience' in gdb6 vs gdb8 is just .. well, I have no need to use gdb6. I kept it around if such situation emerges though.