[CentOS] Centos 6.8

[Robert Jeffares]

I have a file on a Centos 6.8 server that I want to download to another 
Centos 6.8 box in a remote location.
rsync used to work fine from within a shell script run by cron using ssh 
and having set up passwordless login on each machine

the script runs fine from the command line, but not when run by cron

the crontab is owned and operated by root.

has something changed in cron?
has there been an update?
Have looked in all the usual places.

any help/suggestions?

regards

Robert

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