Hi Don Cragun,

Thanks for your reply. Apologies , i shall try describe requirement better. We are using RHEL 7.4 as OS.

as for "Since your requirements aren't clear as to when this testing should be performed, I'll leave that as an exercise for the reader"

We used to get alert from network team that particular node is having high disc utilisation, at the point we manually login into that box perform this housekeeping activity (by deleting files and freeup space ) to bring down to 60 %. There is no need of program to automatically run when disc usage is high.. only thing is when we get alert that disc space is high, then when we execute solution it should delete files from start date based on file name in ascending order (for example like i mention if we have files from 20180701 to 20180831 then it has to start deleting files from date 20180701(keep only last copy for that day ,delete rest) ---> then check if discspace came down to 60 % if not --> continue with next date i.e. 20180702 (keep only last copy for that day ,delete rest)--df check if space is below 60 % --if not take next date i.e 20170703 (keep only last copy for that day ,delete rest) --> df check if its 60 % then exit the program...--> now after some days again if we get notification disc space ---> when we run program --> it should start from 20170704 start doing deletes till such date space equals 60%

apologies if its not still clear...