=== User Security ===
commands run as root unless otherwise stated.

== Set password ==
<code>
passwd <username>
</code>

== Lock user ==
<code>
passwd -l <username>
</code>

== Unlock user ==
<code>
passwd -u <username>
</code>

== Expire user ==
<code>
chage -E0 <username>
</code>

== Remove expire date ==
<code>
chage -E -1 <username>
</code>

== Expiry status ==
<code>
chage -l <username>
</code>