How do you write a multiline comment in shell script?

How do you write a multiline comment in shell script?

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

  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 I comment in a Bash 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.

What is the difference between $* and [email protected]?

There is no difference if you do not put $* or [email protected] in quotes. But if you put them inside quotes (which you should, as a general good practice), then [email protected] will pass your parameters as separate parameters, whereas $* will just pass all params as a single parameter.

How do you comment all lines at once?

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.

How do I comment multiple lines in vim?

How do I run a shell script every minute?

You can set up a bash script that loops forever executing that command then sleeping for 5 minutes. When you start up your computer press ctrl + alt + t and type amazon-sync then minimize the terminal window. Command will run once every 5 minutes (300 seconds).

How do I run a script every 5 minutes in Linux?

Run a program or script every 5 or X minutes or hours

  1. Edit your cronjob file by running crontab -e command.
  2. Add the following line for an every-5-minutes interval. */5 * * * * /path/to/script-or-program.
  3. Save the file, and that is it.

How to use multi-line comments in bash script?

Multiline or block comment in bash is not directly possible. You can use multiple single line comments but I know that’s not very convenient specially when you have to uncomment the entire block of code.

How do you comment out a single line in Unix?

A single-line comment starts with hashtag symbol with no white spaces (#) and lasts till the end of the line. If the comment exceeds one line then put a hashtag on the next line and continue the comment. The shell script is commented out prefixing # character for single-line comment.

How do you comment out a shell script in Linux?

The shell script is commented out prefixing # character for single-line comment. Multi-line comment is a piece of text enclosed in a delimiter (”) on each end of the comment. Again there should be no white space between delimiter (‘ ‘).

Does Bash support multi-line comment in heredoc?

Also I noticed today that some IDE’s like VS Code and PyCharm do not recognize a HEREDOC marker that contains spaces, whereas bash has no problem with it, so I’m updating this answer again. Bash does not provide a builtin syntax for multi-line comment but there are hacks using existing bash syntax that “happen to work now”.

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