Linux系统修改用户密码提示: passwd: Authentication failure

passwd: Authentication failure解决方法

[root@gdyjdb01 ~]# passwd jxphis
Changing password for user jxphis.
Password: 
passwd: authenticate failed


终极解决方法:
echo "jxphis:YourStrongPassword123" | chpasswd
或
echo "你的新密码" | passwd --stdin jxphis

查看帐号是否锁定:
[root@gdyjdb01 ~]# passwd -S jxphis
jxphis PS 2026-11-11 0 99999 7 -1 (Password set, unknown crypt variant.)

Verification: 如果输出中显示 LK（Locked，锁定），你可以使用以下命令将其解锁后再修改密码：
passwd -u jxphis

查看输出结果中的状态标识：
如果显示 LK（Locked），说明该账号已被锁定。
如果显示 NP（No Password），说明没有密码。
如果显示 PS（Password set），说明密码正常。


[root@gdyjdb01 ~]# tail -n 15 /var/log/secure
Nov 12 08:30:02 gdyjdb01 su: pam_unix(su-l:session): session opened for user oracle by (uid=0)
Nov 12 08:30:02 gdyjdb01 su: pam_unix(su-l:session): session closed for user oracle
Nov 12 08:30:02 gdyjdb01 su: pam_unix(su-l:session): session opened for user oracle by (uid=0)
Nov 12 08:30:02 gdyjdb01 su: pam_unix(su-l:session): session closed for user oracle
Nov 13 04:03:04 gdyjdb01 runuser: pam_unix(runuser-l:session): session opened for user cyrus by (uid=0)
Nov 13 04:03:04 gdyjdb01 runuser: pam_unix(runuser-l:session): session closed for user cyrus
Nov 13 08:30:01 gdyjdb01 su: pam_unix(su-l:session): session opened for user oracle by (uid=0)
Nov 13 08:30:02 gdyjdb01 su: pam_unix(su-l:session): session closed for user oracle
Nov 13 08:30:02 gdyjdb01 su: pam_unix(su-l:session): session opened for user oracle by (uid=0)
Nov 13 08:30:02 gdyjdb01 su: pam_unix(su-l:session): session closed for user oracle
Nov 13 08:30:02 gdyjdb01 su: pam_unix(su-l:session): session opened for user oracle by (uid=0)
Nov 13 08:30:02 gdyjdb01 su: pam_unix(su-l:session): session closed for user oracle
Nov 13 11:20:40 gdyjdb01 passwd: pam_unix(passwd:auth): authentication failure; logname=root uid=0 euid=0 tty=pts/1 ruser= rhost=  user=root
Nov 13 11:21:18 gdyjdb01 passwd: pam_unix(passwd:auth): authentication failure; logname=root uid=0 euid=0 tty=pts/1 ruser= rhost=  user=root
Nov 13 11:26:59 gdyjdb01 passwd: pam_unix(passwd:auth): authentication failure; logname=root uid=0 euid=0 tty=pts/1 ruser= rhost=  user=root

日志中会明确记录是哪个 PAM 模块（如 pam_unix、pam_succeed_if 等）拒绝了请求，常见原因包括：密码错误、账号被锁定、密码复杂度策略不符合要求或权限不足。日志最后几行会显示类似于 FAILED executing /usr/bin/passwd 或具体的 PAM 错误代码。