升级Openssh 后最大文件打开数修改不生效，启动 UsePAM yes后，最大文件打开数生效但是 ssh 远程不了问题解决

感谢博主https://blog.csdn.net/Daphnisz/article/details/124040904

升级新版本的openssh 后，永久修改最大文件打开数不生效。

然后需要在 /etc/ssh/sshd_config文件中修改 UsePAM yes。使永久修改最大文件打开数生效。

但是修改完之后，用户无法 ssh 远程。

vi /etc/pam.d/sshd (注意不是 /etc/pam.d/sshd.pam)

#%PAM-1.0
auth required pam_sepermit.so
auth substack password-auth
auth include postlogin
# Used with polkit to reauthorize users in remote sessions
-auth optional pam_reauthorize.so prepare
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 required pam_namespace.so
session optional pam_keyinit.so force revoke
session include password-auth
session include postlogin
# Used with polkit to reauthorize users in remote sessions
-session optional pam_reauthorize.so prepare