“EOF on read” when using SSH authentication method

This article is for Amanda Enterprise (AE)

Issue Symptoms

When using SSH as the authentication method, the following error is seen during a host check on the Backup| What page:

 WARNING: ultra2.zmanda.com: selfcheck request failed: EOF on read from ultra2.zmanda.com

To see more information, perform a host check from command line using the amcheck command.  The below example shows running amcheck for the DailySet1 backup set:

$ amcheck -c DailySet1

	Amanda Backup Client Hosts Check
    Host key verification failed.
	WARNING: ultra2.zmanda.com: selfcheck request failed: EOF on read from ultra2.zmanda.com
	Client check: 1 host checked in 1.393 seconds, 1 problem found

Issue Descriptions

The authentication via SSH is failing.  More detail can be seen in the amcheck output.  In the sample output above, you can see that the SSH authentication is failing because “Host key verification failed”.  This particular message indicates an issue with the SSH keys failing to authenticate on the remote host.  Another message seen may be “Permission denied (publickey,gssapi-with-mic,password)” usually indicating that SSH public key authentication has not been set up at all.


Check the How to enable SSH authentication in Amanda Enterprise article for instructions on how to set up SSH public key authentication for the amandabackup user between backup server and client.

Once resolved, re-perform the amcheck above to confirm the issue is also resolved for Amanda.

fr_FRFrench it_ITItalian es_ESSpanish de_DEGerman pt_BRPortuguese sv_SESwedish tr_TRTurkish nl_NLDutch jaJapanese pl_PLPolish zh_TWChinese id_IDIndonesian ko_KRKorean ms_MYMalay thThai en_USEnglish