Refactored syntax highlighting shortcodes into markdown

content/blog/commands/clean-conntrack-states.md

@@ -10,10 +10,10 @@ tags:
 
 Firewalling on linux is messy, here is an example of how to clean conntrack states that match a specific query on a linux firewall :
 
-{{< highlight sh >}}
+```sh
 conntrack -L conntrack -p tcp –orig-dport 65372 | \
 while read _ _ _ _ src dst sport dport _; do
     conntrack -D conntrack –proto tcp –orig-src ${src#*=} –orig-dst ${dst#*=} \
               –sport ${sport#*=} –dport ${dport#*=}
  done
-{{< /highlight >}}
+```