Normally, Linux and Cygwin systems do not split up arguments. The command introduces a direction to call sh/bash/Perl.įrom the examples above, the ENV utility will invoke the first sh or bash executable found in the user's $PATH.Īnother portability problem faced by most users is the interpretation of arguments. Using the ENV command, you can make your script run across UNIX-like systems without limitations. Thus, if you wish for your script to run across all UNIX-like OSes, you need to use the /usr/bin/env command as the shebang for your script. But, bash or Perl is not always on the same path as /bin/bash or /usr/bin/Perl. Typically, a UNIX system will read the interpreter defined on the first line of a script, be it bash or Perl. Everything written on this line is very important for running your bash or Perl script. This first line is simply referred to as a shebang. If you have noticed, all shell scripts usually start with this line: how to define the path for the ENV commandĪre you ready? Let's read! Why you need to use the /usr/bin/env command.why you need to use the /usr/bin/env command.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |