Return code 255 when trying to connect via ssh with barman

Question

When I do a manual ssh connection it is working fine. But when I run barman check 192.168.0.41 it is giving me ssh : FAILED with return code 255

I have tried all methods that they explained in the pgbarman document like copying public keys and saving it in authorized_keys.

barman@icms-liq:~$ barman check 192.168.0.41
Server 192.168.0.41:

        empty incoming directory: FAILED ('/var/lib/barman/192.168.0.41/incoming' must be empty when archiver=off)

        PostgreSQL: OK
        is_superuser: OK
        PostgreSQL streaming: OK
        wal_level: OK
        replication slot: OK
        directories: OK
        retention policy settings: OK
        backup maximum age: FAILED (interval provided: 2 days, latest backup age: No available backups)
        compression settings: OK
        failed backups: OK (there are 0 failed backups)
        minimum redundancy requirements: FAILED (have 0 backups, expected at least 1)
        ssh: FAILED (Connection failed using 'ssh postgres@192.168.0.41 -o BatchMode=yes -o StrictHostKeyChecking=no' return code 255)
        pg_receivexlog: OK
        pg_receivexlog compatible: OK
        receive-wal running: OK
        archiver errors: OK

Did you try the same command manually that the error message shows? — Laurenz Albe, Aug 06 '19 at 12:52
yes and its giving me this -- barman@icms-liq:~$ ssh postgres@192.168.0.41 -o BatchMode=yes -o StrictHostKeyChecking=no postgres@192.168.0.41: Permission denied (publickey,password). — praveen kumar, Aug 07 '19 at 04:48
There's the root problem you have to solve. What is the command for the manual connection that is working for you? — Laurenz Albe, Aug 07 '19 at 05:33
Ok, be creative. Check which of the two options is your problem. Turn on debugging etc. — Laurenz Albe, Aug 07 '19 at 05:42
Thank you so much for answering my doubts. It worked when i installed without giving password. — praveen kumar, Aug 07 '19 at 09:37

Return code 255 when trying to connect via ssh with barman

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