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-rw-r--r--man/udev.xml2
1 files changed, 2 insertions, 0 deletions
diff --git a/man/udev.xml b/man/udev.xml
index 5a78be3208..98d17bbb54 100644
--- a/man/udev.xml
+++ b/man/udev.xml
@@ -437,6 +437,8 @@
<para>Note that running programs that access the network or mount/unmount
filesystems is not allowed inside of udev rules, due to the default sandbox
that is enforced on <filename>systemd-udevd.service</filename>.</para>
+ <para>Please also note that <literal>:=</literal> and <literal>=</literal> are clearing
+ both, program and builtin commands.</para>
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