I need to delete unwanted old data which was 2006 and 2007 datas from
a folder . I need a shell script which identifies older files which
are 6 months older and should do zip it and have backup those files
and then delete all those files in unix OS. This shell script should
be automated one.When ever the total disc space is 80% then this
shell script automatically run and old files should be cleared and
space should be regained.