Update hosts script to remove duplicate addresses

Author: libraryax

hosts.sh

@@ -1,6 +1,9 @@
 #!/bin/bash
 
 in=$1
+temp=temp.$1
 out=hosts.$1
 
-dig -f $in +noall +short | tee -a $out
+dig -f $in +noall +short | tee -a $temp && \
+sort -u $temp > $out && \
+rm $temp