Copy either .gbdinit or .gdbinit-print-opencog to ~/.gbdinit That is, to your home directory.

Using valgrind with opencog can be tricky, because many spurious messages are created. These can be suppressed with suppression files, like so:

valgrind --suppressions=../scripts/valgrind.guile.suppressions      \
         --suppressions=../scripts/valgrind.python.suppressions     \
         --suppressions=../scripts/valgrind.boost.suppressions      \
         --suppressions=../scripts/valgrind.logger.suppressions     \
         --suppressions=../scripts/valgrind.link-grammar.suppressions  \
    <program_to_debug>

where <program_to_debug> is probably opencog/server/cogserver

Memory leaks: valgrind --leak-check=full

Memory non-leaks: valgrind --leak-check=full --show-leak-kinds=all

Memory profile: valgrind --tool=massif

CPU profile: valgrind --tool=callgrind

then: callgrind_annotate callgrind.out.nnnn