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<chapter xmlns="http://docbook.org/ns/docbook"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:xi="http://www.w3.org/2001/XInclude"
version="5.0"
xml:id="sec-hidepid">
<title>Hiding process information</title>
<para>
Setting
<programlisting>
<xref linkend="opt-security.hideProcessInformation"/> = true;
</programlisting>
ensures that access to process information is restricted to the owning user.
This implies, among other things, that command-line arguments remain private.
Unless your deployment relies on unprivileged users being able to inspect the
process information of other users, this option should be safe to enable.
</para>
<para>
Members of the <literal>proc</literal> group are exempt from process
information hiding.
</para>
<para>
To allow a service <replaceable>foo</replaceable> to run without process
information hiding, set
<programlisting>
<link linkend="opt-systemd.services._name_.serviceConfig">systemd.services.<replaceable>foo</replaceable>.serviceConfig</link>.SupplementaryGroups = [ "proc" ];
</programlisting>
</para>
</chapter>
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