On my Lubuntu 16.04 I connected to my NAS and was not able to delete files. The error message was something like:

Deletion log file could not be created: No authorization.

My connection to the share is established through:

sudo mount -t cifs -o user=USERSERVER,uid=LOCALUSER,gid=LOCALGROUP,username=USERSERVER,password=PW // /media/OMV
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    Just FYI, you can run commands with modified environment, so whenever you need to output error in English, do LC_ALL=C command arg1 arg2 – Sergiy Kolodyazhnyy Jan 17 '17 at 9:21
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    Thanks for this comment, which related to the fact that I originally stated the error in german: "Löschprotokolldatei konnte nicht angelegt werden". I still find this usefull to be in here, because there is practically no evidence of this error findable via google in german at the moment. Thanks! – Ben Jan 17 '17 at 14:28
  • How did you try to delete? – David Foerster Feb 6 '17 at 8:56
  • Fron inside PCmanFM, which is the file manager from Lubuntu, on a share that was mounted via samba. – Ben Feb 6 '17 at 15:09

Because I did not find a lot on the internet about it I wanted to share my solution and keep the german original error message, which is "Löschprotokolldatei konnte nicht angelegt werden".

Somehow, the (hidden) folder SHARENAME/.Trash-1000 was owned by a different user than the one I used when connecting to the share. As soon as I fixed this on the NAS (over ssh) with sudo chown -R USER:GROUP FOLDER I was able to delete again from inside my filemanager that was connected to the share.

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    On some systems, the -R flag in chown must be capitalized, or it'll error out about -r not being proper usage. – Dooley_labs Jan 17 '17 at 12:09
  • thanks, I might have twisted it with 'cp -r'. Corrected it in the answer. – Ben Jan 17 '17 at 13:00

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