On my Qnap Nas I have an Ubuntu LXD container to run. Inside the container I have installed Nextcloud. Everything runs smoothly but suddenly I recognized that one folder and his insides can’t be moved nor deleted.
I checked the ownership with
ls -l and saw that the folder is owned by nobody:nogroup.
drwxr-xr-x 5 nobody nogroup 4096 Nov 26 17:59 DELETE123
chown the folder back to
www-data:www-data and did get this error:
root@ubuntu-nc:/path/to/files# chown www-data DELETE123 chown: changing ownership of 'DELETE123': Operation not permitted
I wanted to check the attribute of the folder. Maybe it is immutable? Did run
root@ubuntu-nc:/path/to/files# lsattr --------------e------- ./DELETE123
Seems ok right? I still tried to run
chattr -a and
chattr-i but again no luck.
root@ubuntu-nc:/path/to/files# chattr -a DELETE123 chattr: Permission denied while setting flags on DELETE123
I did further researches on the internet and it looks like that it could be related to “kernel ownership” or “mounted by host or NFS”. This is all new to me and I really don’t know how to go on and investigate more.
Thanks in advance.