Updated backup section and created Restore instructions (#4052)

README.md

@@ -22,7 +22,7 @@
 * [Gedcom (family tree) files](#gedcom-family-tree-files)
 * [Security](#security)
 * [Backup](#backup)
-
+* [Restore from Backup](#restore-backup)
 
 ## License
 
@@ -298,9 +298,27 @@ backup.
 To make a backup of **webtrees**, you need to make a copy of the following
 
 1. The files in the *webtrees/data* folder.
-2. The files in the *webtrees/media* folder.
-3. The tables in the database. Freely available tools such as
-   [phpMyAdmin](https://www.phpmyadmin.net) allow you to do this in one click.
+2. The tables in the database. Freely available tools such as
+   [phpMyAdmin](https://www.phpmyadmin.net) allow you to do this in one click. Alternatively, You can also make a backup running a mysqldump command (just replace the words *[localhost]*, *[username]*, *[password]* and *[databasename]* with your own):
+
+    `mysqldump --host=[localhost] -u [username] -p[password] --databases [databasename] > dump_file.sql`
+
+    Note that '*-p[password]*' goes together with no space in between.
+
 
 Remember that most web hosting services do NOT backup your data, and this is
 your responsibility.
+
+## Restore from backup
+
+To restore a backup on a new server:
+
+1. Follow the steps in [Installation](#installation) to get a clean new installation.
+
+2. Replace the *data* folder with backup copy.
+
+3. Restore your mysql database using phpmyadmin or running the following command line on your database server using your mysqldumpfile (just replace the words *[username]*, *[password]* and *[databasename]* with your own):
+
+    `mysql -u [username] -p[password] [database_name] < [dump_file.sql]`
+
+4. Confirm the file *data/config.ini.php* contains to correct information to connect to the database and update it if needed.