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This article mainly introduces "how to use here document to write data to file in Bash script". In daily operation, I believe many people have doubts about how to use here document to write data to file in Bash script. Xiaobian consulted all kinds of materials and sorted out simple and easy operation methods. I hope to answer your doubts about "how to use here document to write data to file in Bash script"! Next, please follow the small series to learn together!

The here document is nothing special, just an I/O redirect that tells the bash shell to read input from the current source until it reaches a delimited line.

This is useful for providing instructions to ftp, cat, echo, ssh, and many other useful Linux/Unix commands. This feature applies to bash as well as Bourne, Korn and POSIX shells.

here document syntax

The syntax is:

command

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