I just switched over my server to some new hardware and a fresh ubuntu install and my serendipity blogs work just fine, but every now and then I see the following show up in my apache error.log file:
[Mon Apr 04 04:08:54 2011] [error] [client <some_internet_ip>] PHP Notice: session_start(): ps_files_cleanup_dir: opendir(/var/lib/php5) failed: Permission denied (13) in <path_to_s9y_blog>/serendipity_config.inc.php on line 16
I never saw this error on my old server. Does anyone have any ideas what it might be? Is it someone trying to hack my server, a simple permissions issue, something else?
This error is a problem of you provider, meaning permission not writable session save path possible /tmp.
Please inform your Provider about the problem and the solution.
Else you could do it by your own setting a php.ini file into doc root or changing your original php.ini file by session.save_path = "N;/path" or doing it in serendipitys index file right on top with something like ini_set(session.save_path = "N;/path");