I was using a script to perform rsync in sudo crontab. The script does a 2-way rsync (from serverA to serverB and reverse). the rsync uses ssh to connect between servers. After i reboot both the server machines, the rsync is not working in sudo crontab. I also setup a new cronjob and it fails, The error is: rsync error: unexplained error (code 255) at io.c(600) [sender=3.0.6] rsync: connection unexpectedly closed (0 bytes received so far) [receiver]

However, when run from terminal, the rync script works as expected without issues. please help. looks like issue with ssh. however, i am able to ssh into either servers withoiut issues.