rsh 突然失败。它以前工作正常，所以相关的配置文件应该没问题。
远程命令可以rsh host date正常工作，但远程rsh host返回“rlogin：连接已关闭”。立即地。
紧随 /var/log/messages 和 /var/log/secure 中的相关行。
#/var/log/messages
Jun 29 21:43:42 rt xinetd[41220]: START: login pid=109441 from=::ffff:172.30.253.22
Jun 29 21:43:42 rt xinetd[41220]: EXIT: login status=0 pid=109441 duration=0(sec)
#/var/log/secure
Jun 29 21:43:42 rt rlogind[109441]: pam_rhosts(rlogin:auth): allowed access to root@control-manager as root
/var/log/secure 比正常少了几行。
#/var/log/secure on another server
Jun 29 21:58:47 control-manager rlogind[170299]: pam_rhosts(rlogin:auth): allowed access to root@rt as root
Jun 29 21:58:47 control-manager login: pam_unix(remote:session): session opened for user root by (uid=0)
Jun 29 21:58:47 control-manager login: ROOT LOGIN ON pts/1 FROM rt
Jun 29 21:59:01 control-manager login: pam_unix(remote:session): session closed for user root
这是否意味着 pam_unix 有问题？我该如何解决？