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The root cause is that sftp path in sshd_config is not right. It should be changed from /usr/libexec/sftp-server to /usr/libexec/openssh/sftp-server Verified in my deployment environment sftp can connect to controller. Closes-Bug: 1808054 Change-Id: Ia8d00abc1f18bc3b46faadd87f8ed153a446b7b0 Signed-off-by: zhipengl <zhipengs.liu@intel.com>