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-rw-r--r--man7/namespaces.73
1 files changed, 3 insertions, 0 deletions
diff --git a/man7/namespaces.7 b/man7/namespaces.7
index e1dac0f12e..31d7b1fd1d 100644
--- a/man7/namespaces.7
+++ b/man7/namespaces.7
@@ -671,6 +671,9 @@ The process must be in either the user namespace of the process
.I pid
or inside the parent user namespace of the process
.IR pid .
+.PP
+Writes that violate the above rules fail with the error
+.BR EPERM .
.SS UTS namespaces (CLONE_NEWUTS)
UTS namespaces provide isolation of two system identifiers:
the hostname and the NIS domain name.