#@operating system@# (Or "shebang line", " bang path") "#!" used in Unix to mark the start of a script, e.g. a are "#!", the kernel treats the file as a script rather than everything up to the first whitespace) is used as the line of an executable is #!/usr/local/bin/perl the script will be treated as a Perl script and passed as an argument to /usr/local/bin/perl to be interpreted. Some variants of Unix also allow one or more parameters to be passed to the interpreter, for example, you can write #!/usr/bin/perl -w and the script will be started as if you typed /usr/bin/perl -w #@filename@# on the command line. Also, most modern kernels ignore any whitespace between the "!" and the interpreter pathname. Even some modern kernels have fairly small limits (e.g. 32) on the length of line they will accept, making long pathnames and arguments somewhat unportable. [Does anyone call this a "magic string"?] (1998-05-06)
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