Linux programming

 https://zombie-hunting-club-c.hatenablog.com/entry/2017/11/05/192559#7-%E3%82%BD%E3%83%BC%E3%82%B9%E3%82%B3%E3%83%BC%E3%83%89 :: simple 

https://suzuzusu.hatenablog.com/entry/2021/02/28/190000 :: 多重受付

https://blanktar.jp/blog/2015/02/linux-c-fork-and-pipe　fork/pipe

https://qiita.com/ngyuki/items/62b27f29316d8931102c     prefork server

https://hiroyukichishiro.com/daemon-in-c-language/#forksetsid daemon server

cf https://wireless-network.net/multi-thread-server/ :: pthreads server