Commenting out/Uncommenting a Line in a Debian Configuration 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.)

1. How do I comment out a specific line in Linux?
2. How do I comment multiple lines in conf?
3. How do you comment a line in a file in shell script?
4. How do I uncomment a line in terminal?
5. How do I comment out a line in a file?
6. How do you comment out a line in Unix?
7. How do I comment multiple lines in vi?
8. How do you comment multiple lines?
9. How do you comment multiple lines in bash?
10. How do I comment a line in crontab?
11. How do you comment a block of code in shell script?
12. How do I run a shell script?

How do I comment out a specific line in Linux?

1. add the -e argument for macOS and BSD – Jonas Drotleff Feb 25 '17 at 10:55.
2. To avoid commenting multiple times and taking into account multiple leading # , use the following commands: sed -i '/<pattern>/s/^#*/#/g' file (to comment out) and sed -i '/<pattern>/s/^#*//g' file (to uncomment) – Louis M May 2 '17 at 11:46.

How do I comment multiple lines in conf?

Enter visual mode by pressing v. select the lines you like to comment ( up / down arrow or j / k ) enter :s/^/# / which translates to: in selection ( : ) replace beginning of line ( ^ ) with `# '

How do you comment a line in a file in shell script?

How to Comment Lines 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.

How do I uncomment a line in terminal?

To uncomment 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 the lines to uncomment. If you want to select multiple characters, use one or combine these methods: ...
4. press d or x to delete characters, repeatedly if necessary.

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 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 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?

To block comment /* */ code:

1. In the C/C++ editor, select multiple line(s) of code to comment out.
2. To comment out multiple code lines right-click and select Source > Add Block Comment. ( CTRL+SHIFT+/ )
3. To uncomment multiple code lines right-click and select Source > Remove Block Comment. ( CTRL+SHIFT+\ )

How do you 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 a line in crontab?

Syntax of crontab File Entries

1. Use a space to separate each field.
2. Use a comma to separate multiple values.
3. Use a hyphen to designate a range of values.
4. Use an asterisk as a wildcard to include all possible values.
5. Use a comment mark (#) at the beginning of a line to indicate a comment or a blank line.

How do you comment a block of code 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.

How do I run a shell script?

Steps to write and execute a script

1. Open the terminal. Go to the directory where you want to create your script.
2. Create a file with . sh extension.
3. Write the script in the file using an editor.
4. Make the script executable with command chmod +x <fileName>.
5. Run the script using ./<fileName>.