</term>
<listitem>
<para>
- The date on which the user account will be disabled. The
- date is specified in the format
- <emphasis remap="I">YYYY-MM-DD</emphasis>. Integers as input are
- interpreted as days after 1970-01-01.
+ Specifies the date on which the user account will be disabled.
+ The value can be specified as a date in the YYYY-MM-DD format
+ or as a number of days since 1970-01-01.
+ The date is interpreted using the UTC timezone.
</para>
<para>
- An input of -1 or an empty string will blank the account
- expiration field in the shadow password file. The account
- will remain available with no date limit.
+ An input of -1 or an empty string blanks the account expiration field
+ in the shadow password file.
+ The account will remain available with no expiration date.
</para>
<para>
- This option requires a <filename>/etc/shadow</filename> file.
- A <filename>/etc/shadow</filename> entry will be created if
- there were none.
+ This option requires the <filename>/etc/shadow</filename> file.
+ If no entry exists in the <filename>/etc/shadow</filename> file,
+ the system will automatically create one.
</para>
</listitem>
</varlistentry>
</term>
<listitem>
<para>
- changes the user's login shell. An empty string for SHELL blanks the
+ changes the user's login shell. An empty string for SHELL empties the
field in <filename>/etc/passwd</filename> and logs the user into the
system's default shell.
</para>