Fehrelmeldung:

mysqladmin: connect to server at 'localhost' failed
error: 'Your password has expired. To log in you must change it using a client that supports expired passwords.'


Password Expiration Policy
==========================

# default_password_lifetime
#
# This variable defines the global automatic password expiration policy. It applies 
# to accounts that use MySQL built-in authentication methods (accounts that use an 
# authentication plugin of mysql_native_password, mysql_old_password, or sha256_password).
#
# The default default_password_lifetime value is 0, which disables automatic password 
# expiration. If the value of default_password_lifetime is a positive integer N, it 
# indicates the permitted password lifetime; passwords must be changed every N days.

# The global password expiration policy can be overridden as desired for individual 
# accounts using the ALTER USER statement. See Section 7.3.6, “Password Expiration Policy”.
#
# ! Note !
#
# From MySQL 5.7.4 to 5.7.10, the default default_password_lifetime value is 360 (passwords 
# must be changed approximately once per year). For those versions, be aware that, if you 
# make no changes to the default_password_lifetime variable or to individual user accounts, 
# all user passwords will expire after 360 days, and all user accounts will start running 
# in restricted mode when this happens. Clients (which are effectively users) connecting to 
# the server will then get an error indicating that the password must be changed: 
# ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing 
# this statement.

#  However, this is easy to miss for clients that automatically connect to the server, such 
# as connections made from scripts. To avoid having such clients suddenly stop working due 
# to a password expiring, make sure to change the password expiration settings for those clients, 
# like this:
#   
#    ALTER USER 'script'@'localhost' PASSWORD EXPIRE NEVER
#   
# Alternatively, set the default_password_lifetime variable to 0, thus disabling automatic 
# password expiration for all users.
#
default_password_lifetime = 0