我有一台suse的服务器，用passwd root 来改密码的时候直接被拒绝：
Changing password for root.
passwd: Permission denied
在 etc/log/messages 下的日志文件是这么描述的：
Aug 4 15:35:24 QHXN-PS-MNGW-TJ passwd[29426]: PAM (passwd) illegal module type: ~
Aug 4 15:35:24 QHXN-PS-MNGW-TJ passwd[29426]: PAM (passwd) no control flag supplied
Aug 4 15:35:24 QHXN-PS-MNGW-TJ passwd[29426]: PAM (passwd) no module name supplied
Aug 4 15:35:24 QHXN-PS-MNGW-TJ passwd[29426]: User root: Permission denied
Aug 4 15:35:24 QHXN-PS-MNGW-TJ passwd[29426]: password change failed, pam error 6 - account=root, uid=0, by=0
其他配置文件：
1)etc/passwd:
root:x:0:0:root:/root:/bin/bash
2)etc/pam.d/common-auth:
auth required pam_env.so
auth required pam_unix2.so
auth required pam_tally.so
account required pam_tally.so
3)etc/pam.d/common-password:
password requisite pam_pwcheck.so nullok cracklib
password required pam_unix2.so use_authtok nullok
求助我该怎么弄才能正常修改密码。。。