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1. Here Documents - Bash Reference Manual 2023-09-11

   tags: network/ssh, programming/shell/bash

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   The format of here-documents is:

   1[n]<<[-]word
   2        here-document
   3delimiter
   

   If any part of word is quoted, the delimiter is the result of quote removal on word, and the lines in the here-document are not expanded.

   This is useful to write scripts that:

   • write scripts (verbatim)
   • execute a sequence of commands (verbatim) on a remote host