编写一个脚本，允许用户搜索服务器中的特定行。suiyi 发挥
https://blog.csdn.net/weixin_37490221/article/details/80869792?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522160073556019195162152287%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=160073556019195162152287&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~first_rank_v2~rank_v25-3-80869792.first_rank_v2_rank_v25&utm_term=shell&spm=1018.2118.3001.4187
http://www.cocoachina.com/articles/112667