kerchi:1214838345 wroteDoes anyone know what this means and if it can be rectified? No complicated terminology please because I know very little about how my wiki works as I only use the front end.
As far as I understand, the backup plugin currently tries to run several commands (rm, tar, bzip2, mv) provided by the servers' operating system. On many systems, the program that does the webserving (php) is not allowed to access/run such commands (only the administrator of the comp. may) for security reasons.
The solution would be to have the backup plugin use some of php's own functions (so that php doesn't need to call external tools) like
these. Unfortunately I have not got the knowledge to do it quickly and not got the time to dig me through it by trial and error.
On the other hand, maybe dokuwiki/inc/TarLib.class.php would be a good place to start when considering modifying the backup plugin. I've just come across that, dunno if it makes sense.