add bash script

Author: smallprogram

git_set_username_email.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+# 这里改成你的目标配置
+NEW_NAME="David Mandy"
+NEW_EMAIL="smallprogramzhusir@gmail.com"
+
+git config --global user.name "$NEW_NAME"
+git config --global user.email "$NEW_EMAIL"
+
+echo "Git 配置已更新："
+echo "Name:  $(git config --global user.name)"
+echo "Email: $(git config --global user.email)"
+
+git config --global --list