https://www.computerhope.com/unix/used.htm
https://likegeeks.com/sed-linux/#Read-DataFrom-a-File
http://www.grymoire.com/Unix/Sed.html
https://www.tecmint.com/linux-sed-command-tips-tricks/
https://www.linuxtechi.com/20-sed-command-examples-linux-users/
https://stackoverflow.com/questions/16956810/how-do-i-find-all-files-containing-specific-text-on-linux
原文：https://www.cnblogs.com/WCFGROUP/p/10325465.html