下面几段日志，请大虾帮我分析一下？

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这是solaris 8 的日志，/var/messages中的片段。 主要关于ssh的相关信息。
Feb  5 09:56:54 ftp sshd[10096]: [ID 800047 auth.error] error: Could not get shadow information for NOUSER
Feb  5 18:44:08 ftp sshd[11597]: [ID 800047 auth.error] error: Could not get shadow information for NOUSER
Feb  5 18:44:13 ftp sshd[11599]: [ID 800047 auth.error] error: Could not get shadow information for NOUSER
Feb  5 18:52:30 ftp sshd[11623]: [ID 800047 auth.error] error: Could not get shadow information for NOUSER
Feb  5 18:52:32 ftp sshd[11625]: [ID 800047 auth.error] error: Could not get shadow information for NOUSER
Feb  5 18:52:34 ftp sshd[11627]: [ID 800047 auth.error] error: Could not get shadow information for NOUSER
Feb  5 18:52:36 ftp sshd[11629]: [ID 800047 auth.error] error: Could not get shadow information for NOUSER
Feb  5 18:52:38 ftp sshd[11631]: [ID 800047 auth.error] error: Could not get shadow information for NOUSER
Feb  5 18:52:47 ftp sshd[11639]: [ID 800047 auth.error] error: Could not get shadow information for NOUSER
Feb  5 18:53:32 ftp sshd[11642]: [ID 800047 auth.error] error: Could not get shadow information for NOUSER
Feb  5 18:53:34 ftp sshd[11644]: [ID 800047 auth.error] error: Could not get shadow information for NOUSER
Feb  5 18:53:37 ftp sshd[11646]: [ID 800047 auth.error] error: Could not get shadow information for NOUSER
Feb  5 18:53:40 ftp sshd[11648]: [ID 800047 auth.error] error: Could not get shadow information for NOUSER
Feb  5 18:53:42 ftp sshd[11650]: [ID 800047 auth.error] error: Could not get shadow information for NOUSER
Feb  5 18:53:53 ftp sshd[11659]: [ID 800047 auth.error] error: Could not get shadow information for NOUSER
Jan 26 00:31:28 ftp sendmail[4999]: [ID 702911 mail.alert] unable to qualify my own domain name (ftp) -- using short name
Jan 26 00:43:28 ftp sendmail[5044]: [ID 702911 mail.crit] My unqualified host name (ftp) unknown; sleeping for retry
Jan 26 00:44:28 ftp sendmail[5044]: [ID 702911 mail.alert] unable to qualify my own domain name (ftp) -- using short name
Jan 30 03:10:02 ftp syslogd: line 24: WARNING: loghost could not be resolved
Jan 30 17:02:30 ftp sendmail[22377]: [ID 702911 mail.crit] My unqualified host name (ftp) unknown; sleeping for retry
Jan 30 17:03:30 ftp sendmail[22377]: [ID 702911 mail.alert] unable to qualify my own domain name (ftp) -- using short name
Jan 30 17:17:46 ftp sendmail[22468]: [ID 702911 mail.crit] My unqualified host name (ftp) unknown; sleeping for retry
Jan 30 17:18:46 ftp sendmail[22468]: [ID 702911 mail.alert] unable to qualify my own domain name (ftp) -- using short name
Jan 30 20:55:08 ftp sendmail[23174]: [ID 702911 mail.crit] My unqualified host name (ftp) unknown; sleeping for retry
Jan 30 20:56:08 ftp sendmail[23174]: [ID 702911 mail.alert] unable to qualify my own domain name (ftp) -- using short name
Feb  2 15:02:06 ftp sendmail[1640]: [ID 702911 mail.crit] My unqualified host name (ftp) unknown; sleeping for retry
Feb  2 15:03:06 ftp sendmail[1640]: [ID 702911 mail.alert] unable to qualify my own domain name (ftp) -- using short name


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