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I'm using a ssh to access to a server hosting. I wanted to delete some directories but I realized that i could not delete some files because the owner of those file is "nobody". I wanted to change the owner using chown but I have no permission to do this:
-rw-r--r-- 1 nobody nobody 0 Jun 16 2010 shipped.txt
-rw-r--r-- 1 nobody nobody 493 Jun 16 2010 test.html
-rw-r--r-- 1 nobody nobody 72 Jun 16 2010 test.txt
-rw-r--r-- 1 nobody nobody 1634 Jun 16 2010 voucher.html
-rw-r--r-- 1 nobody nobody 421 Jun 16 2010 voucher.txt
-jailshell-3.2$ rm voucher.txt
rm: remove write-protected regular file `voucher.txt'? y
rm: cannot remove `voucher.txt': Permission denied
-jailshell-3.2$ chown s10889c1 voucher.txt
chown: changing ownership of `voucher.txt': Operation not permitted
Should I contact with the administration staff? Thank you
Is this an NFS mount? Run "df -h ." on the directory the files are in to see what it is mounted from. If you see an IP or hostname followed by a colon then it is an NFS mount. With NFS the filesystem has to be exported to explicitly allow root to do things - by default root isn't allowed to do things.
If it is an NFS mount and you have access to the system shown before the colon by hostname or IP you should login to that system and delete the files there. Also it is possible that a NON-root user login on the host on which you became root DOES have the ability to delete files. You might want to try a NON-root login instead of root.