关于shell：Unix命令查找两个文件中常见的行 | 码农家园
https://www.codenong.com/373810/

Shell command to find lines common in two files - Stack Overflow
https://*.com/questions/373810/shell-command-to-find-lines-common-in-two-files

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https://blog.csdn.net/pingD/article/details/78742471/