diff --git a/10215501451.md b/10215501451.md
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+++ b/10215501451.md
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+touch text1.txt
+
+for i in `seq 50000`;do echo $RANDOM | md5sum | cut -c 1-9 ;done >> text1.txt
+
+export LC_ALL=C
+
+sort text1.txt  | uniq
+
+sort -n text1.txt | uniq
+
+sort text1.txt  | uniq > letter.txt
+
+sort -n text1.txt | uniq >> number.txt
+
+
+
+echo -e "computer\ndata\nscience\nengineering\nscience\nengineeringc\ncomputer\ncomputer\necnu\ndata" > text2.txt
+
+grep computer text2.txt
+
+grep -c computer text2.txt
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diff --git a/lab1/10215501411.sh b/lab1/10215501411.sh
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+++ b/lab1/10215501411.sh
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+SAMESTR="ThisIsTheSameString" #Same String for uniq 
+readonly SAMESTR
+
+##
+# Get random integar between 1 and 100
+##
+function getRandomName(){
+    rnd=`expr $RANDOM % 64 + 1`
+    return $rnd
+}
+
+##
+# Get random string, first parametar is length
+##
+function getRandomString(){
+    openssl rand -base64 $1
+}
+
+function generate(){
+    size=500
+    i=0
+    while(( $i < $size ))
+    do
+        getRandomName
+        length=$?
+        #echo "START"
+        if [[ $length -ge 1  && $length -le 25 ]] 
+        then
+            echo $SAMESTR
+        else
+            echo `getRandomString $length`
+        fi
+        let "i++"
+    done
+}
+
+function sortByASCII(){
+    generate | sort | uniq -u
+}
+
+function sortByNumeric(){
+    generate | sort --numeric-sort | uniq -u
+}
+
+echo "Overwrite lines:" > resultASCII #this line should not appear in output file
+sortByASCII > resultASCII
+echo "Append lines:" >> resultASCII #this line should appear in output file
+sortByASCII >> resultASCII
+
+echo "Overwrite lines:" > resultNumeric #this line should not appear in output file
+sortByNumeric > resultNumeric
+echo "Append lines:" >> resultNumeric #this line should appear in output file
+sortByNumeric >> resultNumeric
+
+echo "Number of same string in file:"
+generate > randomLines
+grep --only-matching $SAMESTR < randomLines | wc --lines
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diff --git a/lab1/10215501415.sh b/lab1/10215501415.sh
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+++ b/lab1/10215501415.sh
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+#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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diff --git a/lab1/10215501417.sh b/lab1/10215501417.sh
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+++ b/lab1/10215501417.sh
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+#!/bin/bash
+
+#生成50000行包含字母与数字的文件
+#需要从urandom中读取字母与数字，共50000次循环，大概需要5-10min左右。
+for((i = 0; i < 50000; i++))
+do
+head -c 50 /dev/urandom | tr -dc A-Za-z0-9 >> RandFile;
+echo -e \ >> RandFile;
+done
+
+#按字母排序
+sort RandFile | uniq;      
+#按数字排序
+sort -n RandFile | uniq;
+#重定向到SortedFile1
+sort RandFile | uniq >> SortedFile1;
+#重定向到SortedFile2
+sort -n RandFile >> SortedFile2;
+
+#统计RandFile中 ab 出现的次数
+grep -o ab RandFile|wc -l;
+
+#git push到码园
+git init   #初始化
+git add .  #添加文件夹下所有文件
+git commit -m "lab1 first commit" #把添加的文件提交到远程版本库
+git remote add origin https://gitea.shuishan.net.cn/10215501417/csapp.git  #建立远程连接
+git push -u origin master #上传代码
+
+#fork工作流：
+#首先 fork目标仓库到自己的远程仓库
+#再git clone到自己的仓库
+git clone https://gitea.shuishan.net.cn/10215501417/Computer-Systems-Labs.git
+#创建一个分支
+git checkout -b hw
+#将代码文件上传
+git add 10215501417.sh
+git commit -m "10215501417's cmommit"
+#然后再发起一个pr到目标仓库
+
diff --git a/lab1/10215501418.sh b/lab1/10215501418.sh
new file mode 100644
index 0000000..2b7ace5
--- /dev/null
+++ b/lab1/10215501418.sh
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+python 1.py > 1.1.txt
+sort -d 1.1.txt > 1.2.txt --unique     
+sort --numeric-sort 1.1.txt > 1.2.txt --unique
+sort -d 1.1.txt >> 1.3.txt --unique
+sort --numeric-sort 1.1.txt >> 1.3.txt --unique
+
+
+python 2.py > 2.txt
+grep "computer" 2.txt
+grep -c "computer" 2.txt
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diff --git a/lab1/10215501435.sh b/lab1/10215501435.sh
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index 0000000..07be095
--- /dev/null
+++ b/lab1/10215501435.sh
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+#!/bin/bash
+#生成50行随机字符串
+for i in {1..50}
+do
+         echo $RANDOM | md5sum | cut -c 1-9 >> random_50.txt
+done
+#将上述50行随机的字符串循环100次，得到5000行有规律的字符串
+times=1
+while((times<=100))
+do
+	head -n 50 random_50.txt >> random_5000.txt
+	times=`expr $times + 1`
+done
+#以覆盖写的方式，字母排序，输出unique行
+sort -u  random_5000.txt > alph.txt
+#以覆盖写的方式，数字排序，输出unique行
+sort -u -n random_5000.txt > number.txt
+#以追加写的方式，字母排序，输出unique行
+sort -u random_5000.txt >> alph.txt
+#以追加写的方式，数字排序，输出unique行
+sort -u -n random_5000.txt >> number.txt
+#已经生成一个含有60个Computer的letter文件
+grep -c "Computer" letter.txt 
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