Good afternoon. There is a file server which runs a bunch of stuff(on centos), there is a backup server(suse) where once a week, runs rsync to backup Samba, etc.
Today, backup has stopped working, so rsync complains:
NAS:~ # rsync -az --delete firstname.lastname@example.org:/home/samba/data/ /mnt/Backups/data/ --progress
ssh: connect to host 10.11.4.100 port 22: No route to host
rsync: connection unexpectedly closed (0 bytes received so far) [Receiver]
rsync error: unexplained error (code 255) at io.c(235) [Receiver=3.1.0]
Configuration has not changed, only turned off the NAS.
After 20 minutes everything worked.
Where to look to find out what did not work? I would like to know where did the problem to know what to treat.