help with script

[anatazi]

Hi all,
I need to write a script that concatenate lists together, and output the resulting list. For example:
clean_list a a:b a:b:c :x: y:z
a:b:c:.:x:y:z

How do I go about that, could someone please help get me started;
Thanks

 

[jamisar]

try this:

STRING=`echo 'a:b:b:z:q:q:Y:i' |tr ',' '\n'|sort -u|tr '\n' ','`

i know a -s option for tr, but could not get it working