Wikipedia:Reference desk/Archives/Computing/2015 March 22

= March 22 =

Apple TV
When showing my photos on my TV via Apple TV the computer seems to find and show photos that I have deleted/trashed on my computer. How come? and what can I do about it please?85.211.198.22 (talk) 07:23, 22 March 2015 (UTC)


 * Is there an option to empty the trash ? If so, that should actually delete them. StuRat (talk) 08:24, 22 March 2015 (UTC)
 * In case emptying the "recycle bin" doesn't work as intended, OP should look for the .Trashes folder. By default this is a "hidden file", you can make you finder show these by following any of these directions . SemanticMantis (talk) 15:04, 23 March 2015 (UTC)
 * I'm not sure if the Trash/Recycle Bin is really the. I don't know much about Apple TV, but I would be surprised if it was really displaying photos from there. A more likely possibility may be the OP hasn't actually deleted those photos. They may have deleted one copy, but something else stored another copy somewhere. Nil Einne (talk) 17:23, 25 March 2015 (UTC)

e learning
Where can I download lectures given in university or classroom by professors ?

Learnerktm 11:53, 22 March 2015 (UTC)


 * In which subjects? For the Sciences and Engineering, MIT and Khan Academy offer free lectures. You've also asked a similar question, this time for the Performing Arts, over at the Humanities desk. LongHairedFop (talk) 12:55, 22 March 2015 (UTC)

LongHairedFop ... I wanted to know the site that provides recordings of class lectures of any subjects. That is all.

Learnerktm 14:07, 22 March 2015 (UTC)


 * MIT's Open Course Ware is the preeminent example of free-to-view classroom lectures. The website is http://ocw.mit.edu and you can navigate to courses by department, by topic, by professor, or use the search feature to find interesting classes.  Nimur (talk) 15:17, 22 March 2015 (UTC)


 * edX has some free classes, including lectures. StuRat (talk) 17:42, 23 March 2015 (UTC)

Securing a MediaWiki server
I have to set up a MediaWiki server as part of a college project. How would I go about securing it? Some information:
 * Must be an Ubuntu server.
 * Uses: apache2, php5, mySqlServer, vsftpd, phpMyAdmin.
 * MediaWiki file uploads are enabled.

I've run the mysql secure install script, disabled vsftpd write_enable=YES after I was finished with it and I've used a htaccess file to block access to phpMyAdmin.

Just looking for some tips and tricks. Especially anything I might have missed. 2A02:8084:9300:2480:2129:BE95:3839:9985 (talk) 18:09, 22 March 2015 (UTC)


 * Exactly what are you trying to secure it from?
 * The MediaWiki itself can be secured by following the instructions documented in the manual: Setting Administrative Rights. You can restrict specific operations to certain user accounts or categories of users.
 * The Apache httpd server can be secured by following Apache security tips. The PHP interpreter can be secured by following PHP security guidelines.
 * The Ubuntu machine can be secured by following best practices, as documented at Ubuntu Basic Security.
 * ... and so on, ad infinitum. If your class of security threats is specific to MediaWiki, you can focus on MediaWiki tips... if you must secure the entire system, you should broaden your scope to include overall machine security; if you must protect against physical attack or theft, ... you see that the strategies become quite different for each type of security problem you wish to address.  No amount of cybersecurity will protect your server if its security is threatened by airstrike.  As the Marine Corps Physical Security Manual reminds you: your computer may need physical security, and your physical security teams may use computers, so there is a bit of a boot-strapping problem to consider.
 * Nimur (talk) 20:57, 22 March 2015 (UTC)