10215501433
/
Computer-Systems-Labs


								#!/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;