How do I comment multiple lines in bash?

In Shell or Bash shell, we can comment on multiple lines using << and name of comment. we start a comment block with << and name anything to the block and wherever we want to stop the comment, we will simply type the name of the comment.

How do you comment multiple lines in Linux?

Commenting Multiple Lines

First, press ESC.
Go to the line from which you want to start commenting.
use the down arrow to select multiple lines that you want to comment.
Now, press SHIFT + I to enable insert mode.
Press # and it will add a comment to the first line.

How do you comment a block of code in shell script?

There is no block comment on shell script. (that reads, from line 10 to 100 substitute line start (^) with a # sign.) (that reads, from line 10 to 100 substitute line start (^) followed by # with noting //.) vi is almost universal anywhere where there is /bin/sh .

How comment multiple lines sed?

3 Answers

/^\s*log.*;$/ s|^|//| If the line starts with log and ends with ; then substitute the start, ^ with //
/\s*^log/, /);$/ s|^|//|” /^log/, /);$/ This is an address range. For all lines within this range, the substitution is performed. The range of lines start from the first regex match to the end match.

How do you comment in bash?

Bash comments can only be done as single-line comment using the hash character # . Every line or word starting by the # sign cause all the following content to be ignored by the bash shell. This is the only way to do a bash comment and ensure text or code is absolutely not evaluated in Bash.

What is multi line comment?

Multi-line Comment Examples Multi-line comments have one or more lines of narrative within a set of comment delimiters. The /* delimiter marks the beginning of the comment, and the */ marks the end. You can have your comment span multiple lines and anything between those delimiters is considered a comment.

What is the shortcut to comment multiple lines?

“Ctrl+/” just toggles selected text to a comment. If selected text spread across multiple lines, “Ctrl+/” toggles individual lines explicitly to comment instead of commenting out the entire block.

How do I comment in bash shell?

How do I comment a large section in bash?

Multiline Comments in Bash Unlike most of the programming languages, Bash doesn’t support multiline comments. The simplest way to write multiline comments in Bash is to add single comments one after another: # This is the first line. # This is the second line.

How do I comment multiple lines in vim?

Using the up and down arrow key, highlight the lines you wish to comment out. Once you have the lines selected, press the SHIFT + I keys to enter insert mode. Enter your command symbol, for example, # sign, and press the ESC key. Vim will comment out all the highlighted lines.

What do comments do in a bash script?

Comments are strings that help in the readability of a program. Comments are ignored while executing the commands in a Bash Script file. Bash provides only single line comments. However, multiline comments are also feasible with a little hack.

How to add single or multiline comment in bash script?

Writing Comments in Bash Scripts: Single Line, Inline and Multi-line Comments 1 is treated as comment in bash. The only exception to this rule is #! 2 Inline comments in bash script. You can also add inline comments in bash scripts. 3 Multiline comments in bash script. Multiline or block comment in bash is not directly possible.

How to print comments in a shell script?

If your comments are actually some sort of documentation, you can then start using the Perl syntax inside the commented block, which allows you to print it out nicely formatted, convert it to a man-page, etc. As far as the shell is concerned, you only need to replace ‘END’ with ‘=cut’.

Why do I use single quotes in Bash?

So the single-quotes give you more freedom on the open-close comment marker. For example the following uses a triple hash which kind of suggests multi-line comment in bash. This would crash the script if the single quotes were absent.

https://www.youtube.com/watch?v=DS8ozL__jog

How do I comment multiple lines in bash?