To add a multi-line comment in a shell script under Bash or KSH, you can use the following syntax:
# This is a comment # that spans # multiple lines
Each line of the comment must start with the # character. This is the standard way to add comments in Bash and KSH scripts.
Alternatively, you can use the << sequence followed by a delimiter of your choice, and then end the comment with the same delimiter on a line by itself, like this:
<<DELIMITER This is a comment that spans multiple lines DELIMITER
The << sequence is known as a "here document" in Bash and KSH, and it allows you to include multiple lines of text without having to escape special characters. The delimiter that you choose can be any string, as long as it does not appear elsewhere in the script.
Both of these methods are commonly used to add multi-line comments in Bash and KSH scripts. The choice of which method to use is mostly a matter of preference.