Redirect output to avoid warning.

path.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-GUROBI_PATH=$(ls -d $HOME/.softwares/gurobi*/linux64)
+GUROBI_PATH=$(ls -d $HOME/.softwares/gurobi*/linux64 2> /dev/null)
 
 if [ -e "$GUROBI_PATH" ]; then
     LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:${GUROBI_PATH}/lib