Re: [MLUG] backup via cron

[Daniel Nowlin <EMAIL:PROTECTED>]

That was the problem. ^M's.

dvd+rw-format -f /dev/dvd;^M
growisofs -Z /dev/dvd -J -r /var/ftp/files;^M

What is funny is when I edit the file with nano I can not get rid of the 
^M's. Has got to be a setting in nano or putty?

Dan

Mike Miller wrote:
> On Sat, 4 Feb 2006, Stephen Montgomery-Smith wrote:
>
> > My theory was wrong. I don't know why the semi-colon fixed the 
> > script. Maybe it is a bug with bash.
>
> I doubt that your theory was completely wrong. He might have deleted 
> the carriage return inadvertently (they are invisible in nano). It is 
> possible that some other invisible character was there. This kind of 
> thing comes up a lot with my students. I was once stumped on a problem 
> and found out with the help of one of our supercomputer staff that one 
> character in my script was something weird. I don't know where it came 
> from. Many programs will show some characters as spaces when they are 
> not space characters. Here are two things I've sometimes done when I 
> can't figure out what's wrong:
>
> less -u filename
>
> tr -d '[ -~]\n' < filename | wc
>
> The less command will reveal the carriage returns as ^M characters 
> highlighted in reverse video.
>
> The tr command deletes all characters not in the normal ascii set. The 
> tr command followed by wc should return all zeros like this:
>
> # tr -d '[ -~]\n' < .cshrc | wc
> 0 0 0
>
> If it does not return all zeros, there's something in the file such as 
> a control character or other weirdness. You can redirect the output of 
> tr to a file and examine what you have:
>
> # tr -d '[ -~]\n' < filename > test_file_to_examine.out
>
> Once you figure out what the characters are, you can go back to your 
> original file and try to repair it.
>
> Mike
>
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