Writing Comments in Bash Scripts

In Bash, everything after the hash mark ( # ) and until the end of the line is considered to be a comment. If you have any questions or feedback, feel free to leave a comment.

1. How do I comment in a bash script?
2. How do I comment multiple lines in a bash script?
3. How do I add comments to a .sh file?
4. How do you write comments in Shell?
5. How do I comment multiple lines in vi?
6. How do you comment multiple lines in a shell script?
7. How do I comment multiple lines in vim?
8. When writing a script what symbol is used to make a comment?
9. How many types of comments does shell script support?
10. How do you comment out a script?
11. How do you write a script in Unix?
12. How do you comment a block in shell script?

How do I comment in a bash script?

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.

How do I comment multiple lines in a bash script?

Multiple line comments:

There is no direct option to comment multiple lines in the bash script. You can use other features of bash to comment multiple lines in a script. One option is using 'here document' and another option is using ':'.

How do I add comments to a .sh file?

The # symbol still marks a comment; the # and anything following it is ignored by the shell. now run chmod 755 first.sh to make the text file executable, and run ./first.sh . Now let's make a few changes. First, note that echo puts ONE space between its parameters.

How do you write comments in Shell?

1. A word or line beginning with # causes that word and all remaining characters on that line to be ignored.
2. These lines aren't statements for the bash to execute. ...
3. These notes are called comments.
4. It is nothing but explanatory text about script.
5. It makes source code easier to understand.

How do I comment multiple lines in vi?

Commenting Multiple Lines

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

How do you comment multiple lines in a shell script?

For multiline comment use the following syntax:

1. #!/usr/bin/env bash # my comment 1 # my comment 2 # my comment N.
2. #!/bin/bash echo "Say Something" <<COMMENT1 your comment 1 comment 2 blah COMMENT1 echo "Do something else"

How do I comment multiple lines in vim?

To comment out blocks in vim:

1. press Esc (to leave editing or other mode)
2. hit ctrl + v (visual block mode)
3. use the ↑ / ↓ arrow keys to select lines you want (it won't highlight everything - it's OK!)
4. Shift + i (capital I)
5. insert the text you want, e.g. %
6. press Esc Esc.

When writing a script what symbol is used to make a comment?

Comment is a text in a computer program that is a programmer-readable explanation or annotation in the source code. It is ignored by compiler/interpreter. In Python script, the symbol # indicates start of comment line. It is effective till the end of line in the editor.

How many types of comments does shell script support?

They are not executed when we execute the commands in Bash Script file. Bash script provides support for two types of comments, just like the other programming language.

How do you comment out a script?

You can insert comments and remarks in the script code, or deactivate parts of the script code by using comment marks. All text on a line that follows to the right of // (two forward slashes) will be considered a comment and will not be executed when the script is run.

How do you write a script in Unix?

How to Write Shell Script in Linux/Unix

1. Create a file using a vi editor(or any other editor). Name script file with extension . sh.
2. Start the script with #! /bin/sh.
3. Write some code.
4. Save the script file as filename.sh.
5. For executing the script type bash filename.sh.

How do you comment a block in shell script?

In Vim:

1. go to first line of block you want to comment.
2. shift-V (enter visual mode), up down highlight lines in block.
3. execute the following on selection :s/^/#/
4. the command will look like this: :'<,'>s/^/#
5. hit enter.