su - username 提示资源暂时不可用

[乡长]

cat passwd 如下：

sysomc:x:1062:1008:It is the user for maintenance and inspection:/home/sysomc:/usr/bin/csh
dds6:x:300:109:It is the user for installing and running the DDS:/home/dds6:/usr/bin/csh
insta_oracle:x:1063:100::/home/insta_oracle:/usr/bin/ksh
oracle:x:1048:120::/home/oracle:/bin/bash
devdata:x:600:300::/home/devdata:/bin/bash
imapuser:x:550:200::/home/imapuser:/usr/bin/cshftpuser:x:650:350::/home/ftpuser:/bin/bash
srcuser:x:700:400::/home/srcuser:/bin/bash
nmsguest:x:750:450::/home/nmsguest:/bin/bash
omc:x:1064:200::/user/omc:/bin/bash
cidac2:x:1065:100::/home/cidac2:/usr/bin/csh

求解，谢谢

[masmaster]

检查/etc/pam.d/su