建立一个名为agetest的账号，该账号第一次登陆后使用默认密码，但必须更改密码后使用新密码才能够登陆系统使用bash环境

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[root@centos dashboard]# useradd agetest
[root@centos dashboard]# echo "agetest" | passwd --stdin agetest
Changing password for user agetest.
passwd: all authentication tokens updated successfully.
[root@centos dashboard]# chage -d 0 agetest
[root@centos dashboard]# chage -l agetest | head -n 3
Last password change					: password must be changed
Password expires					: password must be changed
Password inactive					: password must be changed
[root@centos dashboard]# logout

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[root@study ~]#ssh agetest@ip
agetest@ip's password:
You are required to change your password immediately (administrator enforced)

WARNING: Your password has expired.
You must change your password now and login again!
Changing password for user agetest.
Current password:
New password:
Retype new password:
passwd: all authentication tokens updated successfully.
Connection to ip closed.