bash comment line in file

To write single line comments in bash, start the line with the hash symbol (#). HashBang (#!) in the first line of the script file is the only exception. Following is an example Bash Script that has single line comments in between commands.

1. How do I comment out a line in a file?
2. How do you comment out a line in bash?
3. How do you comment a line in Shell?
4. How do I comment multiple lines in bash?
5. How do I comment all lines in crontab?
6. How do you comment out a line in Unix?
7. How do you comment out a line in Linux?
8. What is #!/ Bin bash?
9. How do you write an if statement in bash?
10. How do you comment multiple lines in Python?
11. How do I comment in a batch file?
12. How do you comment a script in Linux?

How do I comment out a line in a file?

The Short Answer. You can “uncomment a line” in a configuration file by removing the # at the start of the line. Or, to “comment out” a line, add a # character to the start of the line. (Note that some languages have different comment formats, so this may not be true if you're working with a source code file.)

How do you comment out a line in bash?

How to Comment Lines in a Bash Script? Bash comments can only be done as single-line comment using the hash character # .

How do you comment a line 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 bash?

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 comment all lines in crontab?

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 out a line in Unix?

You can comment by placing a octothorpe # or a : (colon) at the start of the line, and then your comment. # can also go after some code on a line to add a comment on the same line as the code.

How do you comment out a line in Linux?

Whenever you want to comment a line, put a # in an appropriate place in a file. Anything beginning after # and ending at the end of the line won't get executed. This comments out the complete line.

What is #!/ Bin bash?

When you tell #!/bin/bash then you are telling your environment/ os to use bash as a command interpreter. This is hard coded thing. Every system has its own shell which the system will use to execute its own system scripts. This system shell can be vary from OS to OS(most of the time it will be bash.

How do you write an if statement in bash?

The if statement starts with the if keyword followed by the conditional expression and the then keyword. The statement ends with the fi keyword. If the TEST-COMMAND evaluates to True , the STATEMENTS gets executed. If TEST-COMMAND returns False , nothing happens, the STATEMENTS gets ignored.

How do you comment multiple lines in Python?

Let's have a look at them!

1. Using multiple single # line comments. You can use # in Python to comment a single line: # THIS IS A SINGLE LINE COMMENT. ...
2. Using triple-quoted string literals. Another way to add multiline comments is to use triple-quoted, multi-line strings.

How do I comment in a batch file?

1. REM must be followed by a space or tab character, then the comment. ...
2. If ECHO is ON, the comment is displayed. ...
3. You can also place a comment in a batch file by starting the comment line with two colons [::]. ...
4. You can use REM to create a zero-byte file if you use a redirection symbol immediately after the REM command.

How do you comment a script in Linux?

To write single line comments in bash, start the line with the hash symbol (#). HashBang (#!) in the first line of the script file is the only exception. Following is an example Bash Script that has single line comments in between commands.