Any line that begins with a
# is a comment in many languages and is ignored by the interpreter (
However, if the first line of a script in Linux begins with a
#! (shebang as it is called), it is not a comment but a directive to the program loader to actually run the program specified after
#! and pass it the name of your file as the last argument.
For example, if the first line is
it means the shell will actually invoke
/usr/bin/perl -w /path/to/the/script and you don't need to specify a program to run this script, you can run it using
if you have the permission to run it and it is located on a filesystem supported for execution and the file has the permission to be executed.
For the interpreter, however, this line is always just a comment, so if the script is executed as:
then the line has no effect. (Thanks to Ruslan for pointing this out).
Be warned that
# is not always indicative of a comment. For example, a statement beginning with a
# in C is pre-processor directive and not a comment.
In your case, the line is a comment and will be ignored while execution.
The file you are talking about is a
menu.lst for which a comment is a line beginning with
## and not