Updated README (markdown)

README.md

@@ -42,7 +42,7 @@ MAILTO="admin@example.com"
 
 ### notifications
 utilize crons MAILTO directive for getting error notifications.
-```
+```text
 MAILTO=admin@example.com
 ```
 
@@ -50,24 +50,24 @@ MAILTO=admin@example.com
 ### automation
 for automated backups configure a sshkey for the root user and
 configure your remote machines to trust that key.
-```
+```sh
 sudo su
 ssh-keygen
 ssh-copy-id <remote machine>
 ```
 you must add the backupuser to /etc/sudoers on your remote servers as well
 to make automated backups work. type:
-```
+```sh
 sudo visudo #this will open /etc/sudoers in a texteditor
 ```
 and add following at the end of that file:
-```
+```text
 backupuser ALL=(root)NOPASSWD: /usr/bin/rsync
 ```
 
 you can use a file which should have a source/destination combination each line.
 example listfile:
-```
+```text
 #<source> <destination> [<versions>]
 david@dev.socialnerds.org:/home/david /home/david/Downloads/devhome 30
 backupuser@dev.socialnerds.org:/home/gollum/ /home/david/Downloads/gollum
@@ -78,7 +78,7 @@ backupuser@dev.socialnerds.org:/home/gollum/ /home/david/Downloads/gollum
 ### ~/.sshbackup
 an example config for default values looks like this.
 if you don't use a config file there are useful defaults though.
-```
+```text
 #rsync options.
 rsyncoptions="-pogEthrzl --numeric-ids --no-motd"
 #dotglob option removes bug while rsyncing folder with no visible files in it.