To Find and Delete bigger size and older files in Linux

--To find out files size more than 5MB
find . -size +5000  -exec ls -ltr {} \;
-- To **Remove** files size more than 5MB
find . -size +5000k  -exec rm -rf {} \;

--To find out files older than 30days
find . -mtime +30 -exec ls -ltr {} \;
--To find **Remove** files older than 30days
find . -mtime +30  -exec rm -rf {} \; &