diff --git a/shell.sh b/shell.sh
new file mode 100644
index 0000000..4f5dc9e
--- /dev/null
+++ b/shell.sh
@@ -0,0 +1,35 @@
+#sudo apt-get update
+echo "仅支持Debian 10，9，8，7"
+result=`lsb_release -a`
+
+target="/etc/apt/sources.list"
+echo ======================================
+mv /etc/apt/sources.list /etc/apt/sourcesbackup.list
+echo "原sources.list文件已在/etc/apt路径下备份为sourcesbackup.list"
+echo ======================================
+echo $result
+echo ======================================
+codename=${result##*:}
+#截取result变量获取到的内容，从右向左第一个 ： 开始左边全部删除并存入codename变量
+echo codename
+echo $codename
+echo ======================================
+echo result
+echo ${result##*:}
+echo ======================================
+	echo "写入中"
+	echo ======================================
+	echo "deb http://mirrors.ustc.edu.cn/debian/ "${codename}" main non-free contrib" > $target
+	echo "deb http://mirrors.ustc.edu.cn/debian/ "${codename}"-proposed-updates main non-free contrib" >> $target
+	echo "deb-src http://mirrors.ustc.edu.cn/debian/" ${codename} "main non-free contrib">> $target
+	echo "deb-src http://mirrors.ustc.edu.cn/debian/" ${codename}"-proposed-updates main non-free contrib" >>$target
+	echo "写入完成"
+	echo ======================================
+echo "更新软件源"
+sudo apt-get update
+#更新apt软件源
+echo ======================================
+echo "升级"
+sudo apt-get upgrade
+echo ======================================
+#执行一次升级