Question

#!/usr/bin/perl
$command="lscpu | grep -i Architecture";
#$arch = system($command);
@SplitArch = split(/:/, system($command));
print @SplitArch[1];

The result I get is:

Architecture:          x86_64

I was hoping that the only thing that would display is:

x86_64

Answer 1

This doesn’t do what you think it does. The system function runs the command and returns its exit status; so in your case, this:

system($command)

prints Architecture: x86_64, so this:

@SplitArch = split(/:/, system($command));

prints Architecture: x86_64 and sets @SplitArch to (0).

print @SplitArch[1] then prints nothing, because @SplitArch has only one element. (By the way, you probably meant to write $SplitArch[1] rather than @SplitArch[1], but that’s neither here nor there.)

Since you apparently intend to capture the output of $command, use `...` or qx/.../ instead:

@SplitArch = split(/:/, `$command`);