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Re^5: how to use perl variable in system command to run on unixby Laurent_R (Canon) |
on Sep 03, 2013 at 17:53 UTC ( [id://1052157]=note: print w/replies, xml ) | Need Help?? |
Because $9 is a variable in Perl, the ninth capture in a regular expression. Since you don't have a regex before, it is an undefined variable in your case, so il will be omitted altogether from your command line. If you escape the $ sign, you say that you want a $ sign, not a variable called $9. Then it is not interpolated and passed to awk correctly.
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