centos 6.5 ssh 升級到 6.6 採雷過程

製做ssh rpm 包升級後，ssh沒法登陸系統，報錯以下：

PAM unable to dlopen(/lib64/security/pam_stack.so): /lib64/security/pam_stack.so: cannot open shared object file: No such file or directory
PAM adding faulty module: /lib64/security/pam_stack.so

通過排查發現是ssh rpm 升級後會修改/etc/pam.d/sshd 文件

#%PAM-1.0
auth       required     pam_stack.so service=system-auth
account    required     pam_nologin.so
account    required     pam_stack.so service=system-auth
password   required     pam_stack.so service=system-auth
session    required     pam_stack.so service=system-auth

須要恢復原來的模樣，以下：

#%PAM-1.0
auth       required     pam_sepermit.so
auth       include      password-auth
account    required     pam_nologin.so
account    include      password-auth
password   include      password-auth
# pam_selinux.so close should be the first session rule
session    required     pam_selinux.so close
session    required     pam_loginuid.so
# pam_selinux.so open should only be followed by sessions to be executed in the user context
session    required     pam_selinux.so open env_params
session    optional     pam_keyinit.so force revoke
session    include      password-auth