fix minor bugs in linux install

0.2/install-sdk-linux.sh

@@ -238,7 +238,7 @@ if [ "$CREATE_SYMLINKS" = true ]; then
 
             # Create symlink
             ln -sf "$SDK_INSTALL_DIR/$SDK_VERSION/bin/$CMD_NAME" "$BIN_INSTALL_DIR/$CMD_NAME"
-            ((SYMLINK_COUNT++))
+            SYMLINK_COUNT=$((SYMLINK_COUNT + 1))
         fi
     done
     log_success "Created $SYMLINK_COUNT command symlinks in $BIN_INSTALL_DIR"

0.2/install-sdk-macos.sh

@@ -252,7 +252,7 @@ if [ "$CREATE_SYMLINKS" = true ]; then
 
             # Create symlink
             ln -sf "$SDK_INSTALL_DIR/$SDK_VERSION/bin/$CMD_NAME" "$BIN_INSTALL_DIR/$CMD_NAME"
-            ((SYMLINK_COUNT++))
+            SYMLINK_COUNT=$((SYMLINK_COUNT + 1))
         fi
     done
     log_success "Created $SYMLINK_COUNT command symlinks in $BIN_INSTALL_DIR"

novacomd/install-linux.sh

@@ -215,7 +215,7 @@ echo ""
 
 # Offer to create systemd service
 echo ""
-read -p "Would you like to create a systemd service for automatic startup? [y/N]: " create_service
+read -p "Would you like to create a systemd service for automatic startup? [Y/n]: " create_service
 if [[ ! $create_service =~ ^[Nn]$ ]]; then
     SERVICE_FILE="/etc/systemd/system/novacomd.service"