diff --git a/lab1/10215501415.sh b/lab1/10215501415.sh
new file mode 100644
index 0000000..83893ef
--- /dev/null
+++ b/lab1/10215501415.sh
@@ -0,0 +1,15 @@
+#两个字符串文件均由python生成
+#按数字排序
+
+#覆盖写
+cat hw1.txt | sort | uniq -d > 1.txt
+cat hw1.txt | sort -n | uniq -d > 1.txt
+
+#追加写
+cat hw1.txt | sort | uniq -d >> 2.txt
+cat hw1.txt | sort -n | uniq -d >> 2.txt
+
+
+#找出指定字符串
+grep computer hw1-2.txt
+grep -c computer hw1-2.txt
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