====== join ======
  * [[https://man7.org/linux/man-pages/man1/join.1.html|join(1) - Linux manual page]]
  * 두 파일의 라인을 합친다.
  * see [[linux:diff|diff]]

===== 참조 =====
  * [[https://shapeshed.com/unix-join/|Linux and Unix join command tutorial with examples | George Ornbo]]
  * [[https://www.geeksforgeeks.org/join-command-linux/|join Command in Linux - GeeksforGeeks]]