Merge branch 'master' into lab1

lab1/10211900416.sh

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+#!/bin/bash
+chmod +x ./work1.sh #add permisson to execute
+rm strings
+rm sort_by_ascii
+rm sort_by_num
+rm summ
+rm strings2
+for i in `seq 1000`; #50000 lines is too long to wait, choose 1000 lines
+do 
+	echo $RANDOM | md5sum | cut -c 1-9 ;
+done >> strings
+export LC_ALL=C
+sort -d strings | uniq -u > sort_by_ascii
+sort -n strings | uniq -u > sort_by_num
+cat sort_by_ascii >> summ
+cat sort_by_num >> summ
+
+for i in `seq 666`; #generate a file randomly
+do
+	echo $RANDOM | md5sum | cut -c 1-9;
+done >> strings2
+grep -o "de" strings2 | wc -w 
+

lab1/10215501406.sh

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+#1
+for i in `seq 50000`;do echo $RANDOM | md5sum | cut -c 1-9 ;done > 1.txt
+sort -d 1.txt | uniq
+sort -n 1.txt | uniq
+sort -d 1.txt | uniq > 1_uniq_by_asc.txt
+sort -n 1.txt | uniq > 1_uniq_by_num.txt
+cat 1_uniq_by_asc.txt | uniq >> 1_uniq_total.txt
+cat 1_uniq_by_num.txt | uniq >> 1_uniq_total.txt
+
+#2
+for i in `seq 50000`;do echo $RANDOM | md5sum | cut -c 1-9 ;done > 2.txt
+grep 'computer' 2.txt
+grep -o 'computer' 2.txt | wc -l

lab1/10215501406.txt

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+#1
+for i in `seq 50000`;do echo $RANDOM | md5sum | cut -c 1-9 ;done > 1.txt
+sort -d 1.txt | uniq
+sort -n 1.txt | uniq
+sort -d 1.txt | uniq > 1_uniq_by_asc.txt
+sort -n 1.txt | uniq > 1_uniq_by_num.txt
+cat 1_uniq_by_asc.txt | uniq >> 1_uniq_total.txt
+cat 1_uniq_by_num.txt | uniq >> 1_uniq_total.txt
+
+#2
+for i in `seq 50000`;do echo $RANDOM | md5sum | cut -c 1-9 ;done > 2.txt
+grep 'computer' 2.txt
+grep -o 'computer' 2.txt | wc -l

lab1/10215501413.sh

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+#!/bin/bash
+
+# 读取随机数据并转为 base64 编码
+head -n 50000 /dev/urandom | base64 > random;
+# 抽取 50000 行数据
+head -n 50000 random > random2;
+# rename
+rm random;
+mv random2 random;
+
+# 按 asc 排序
+sort --unique random > unique_sort_by_asc;
+# 按 num 排序
+sort --unique --numeric-sort random > unique_sort_by_num;
+
+# 追加写
+cat unique_sort_by_asc > totall;
+cat unique_sort_by_num >> totall;
+
+# 匹配并统计字符
+grep -o "com" totall | wc -l > number_of_com;

lab1/hw1.sh

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+sort data.txt | uniq -u
+sort -n data.txt | uniq -u
+sort data.txt > data2
+sort -n data.txt > data3
+sort data.txt >> data2
+sort -n data.txt >> data3
+
+grep ABC data.txt
+grep -o ABC data.txt
+grep ABC data.txt | wc -l
+grep -o ABC data.txt | wc