Enable Redis Unix socket. Add ffmpeg

pages/02.linux/nextcloud/default.en.md

@@ -156,18 +156,33 @@ apt install redis php-redis
 
 If Redis is installed on the same machine, unix sockets can be used to communicate.
 
+Enable `unixsocket` in the redis config file located under `/etc/redis/redis.conf`  
+Uncomment the provided default value  
+Set `unixsocketperm` to `777`, so the `www-data` webserver user can access it.  
+_NOTE: There's probably a better way of doing this involving groups, but I wanted to get it working_
+
 Add these lines to `config.php`
 
 ```php
 'filelocking.enabled' => true,
 'memcache.locking' => '\OC\Memcache\Redis',
 'redis' => array(
-    'host' => '/var/run/redis/redis.sock',
+    'host' => '/run/redis/redis-server.sock',
     'port' => 0,
     'timeout' => 0.0,
 ),
 ```
 
+Restart the Redis and Apache2 services  
+[shroot]
+
+```sh
+systemctl restart apache2
+systemctl restart redis
+```
+
+[/shroot]
+
 ### Cron
 
 To execute regular jobs, I personally use cron.  
@@ -310,6 +325,12 @@ mariadb -h [SERVER] -u [USERNAME] -p[PASSWORD] [DB NAME] < nextcloud-sqlbkp.bak
 
 > [Nextcloud documentation](https://docs.nextcloud.com/server/latest/admin_manual/maintenance/restore.html)
 
+### Plugins
+
+#### Memories
+
+Install `ffmpeg` to enable thumbnail generation for video files.
+
 ## Migration
 
 ### Tips