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Download file from url if exists, otherwise return non-zero value to system.
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| function ftp_get(){ | |
| ftp -V "$1" | |
| } |
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Using command ftp with URL file as argument assures either remote file copy or an error (non-zero value return).
Otherwise, other commands like wget, under somre situations wille read html response and output it as file returning a zero value to system so we get undesired file with a non error return.