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626 posts

Ultimate Geek

#261821 16-Dec-2019 20:05
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 Hi Ive been trying to get my data off one drive and onto another using this command and variants;
 sudo tar -cvpzf alsmain2018.tar.gz --exclude=alsmain2018.tar.gz --exclude-caches --one-file-system /media/alistair/USB450G/backintime/alsmain/ --exclude-from <(find /media/alistair/USB450G/backintime/alsmain/ -size +100M)
 which results in:
 tar: /dev/fd/63: No such file or directory
 tar: Error is not recoverable: exiting now


 Ive tried removing last directory backslash and if I run the command: sudo find /media/alistair/USB450G/backintime/alsmain/ -size +100M
 find works as expected, finding files over 100m.


 If I run command: sudo tar -cvpzf alsmain2018.tar.gz --exclude=alsmain2018.tar.gz --exclude-caches --one-file-system /media/alistair/USB450G/backintime/alsmain/
 backup works no errors.




Can anyone figure why my find is wrong?
 Thanks kindly, Al.

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856 posts

Ultimate Geek

  #2376618 16-Dec-2019 20:44
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Most of the examples I’ve seen run find and pipe (or use -exec) the output to the tar command:

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148 posts

Master Geek


  #2376787 17-Dec-2019 09:47
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It's the combination of sudo and the <( ) construct.


$ cat <(echo foo)




$ sudo cat <(echo foo)


cat: /proc/self/fd/11: No such file or directory


You could run the find to a file in /tmp, then use that.

147 posts

Master Geek

  #2376864 17-Dec-2019 11:32
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In the command you use sudo elevates tar only. You cannot pipe data between processes running under different user IDs. You can try:


sudo sh -c 'sudo tar -cvpzf alsmain2018.tar.gz --exclude=alsmain2018.tar.gz --exclude-caches --one-file-system /media/alistair/USB450G/backintime/alsmain/ --exclude-from <(find /media/alistair/USB450G/backintime/alsmain/ -size +100M)'


626 posts

Ultimate Geek

  #2377026 17-Dec-2019 13:46
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Thanks, that was it, sudo was doing the damage.

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