使perl脚本可执行...我可以取消前面的“ perl”语句吗？

Question

This is a pretty simple one... I just want to make a perl script executable without the preceding perl command, and instead let the environment deduce the interpreter from the shebang line. Here is my sample script called test :

#!/usr/bin/perl
print "Hey there\n";

I then use chmod 775 test to make the script executable. If I use the command perl test , I get the output Hey there .

However, if I just type test , I get no output. What's the deal? Why isn't my shebang line making the environment realize this is perl? Can someone please help me?

Answer 1

Don't name your script test . This is a built-in command in most shells, so they don't go looking for an external program.

Also, to run a program in your current directory, you should type ./programname . It's generally a bad idea to have . in your $PATH , which would be necessary to execute it without the directory prefix.

Answer 2

To run something from the current directory you need to prefix "./" to tell it "this directory" ie ./testprogram .

If you type just test it will look in standard install directories like /bin. This is why when you run cp or rm it knows where the executable is.

As mentioned by others, naming scripts test is not allowed with most shells.