Administering Virtualmin domains
This note is about administering domains or virtual servers through the web interface, not about working on them (use this other note to work on a domain).
Raising the quota of a domain and of its unix account
Section titled “Raising the quota of a domain and of its unix account”(The quota is edited as the master administrator, not as the domain administrator.)
There are two quotas, one for the whole virtual server/domain and one for the unix account of the server. Here is the menu to edit the quota:

Raise both figures. The unix quota must be lower than or equal to the quota of the virtual server/domain.
Managing FTP users
Section titled “Managing FTP users”-
To reach the FTP user management:

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Then click "Add an FTP user".
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Fill in the form, setting the directory (a subdirectory of the site, for example public_html/coincoin) the user is allowed to reach:

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Test the connection with FileZilla or another client:

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Accept the server certificate:

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If this message appears, there is no significant problem as far as we know, it seems to be a FileZilla issue:

