On all Forbiden server sites?

Question

Access rights

[email protected]:~# chown -R www-data:www-data /var/www - operation not allowed
why?

Answer 1

Look at the output, ls -lhaand it will lsattr
probably help you chattr -R +i /var/www( man )
If not, things get interesting. See if there are disks mounted in RO: egrep " ro,|,ro " /proc/mounts
If the disk is on /var/wwwthis list, you should think about how you can remount it in RW and how it happened in general.