unshare: add note about persisten PID namespaces

Signed-off-by: Karel Zak <kzak@redhat.com>

diff --git a/sys-utils/unshare.1 b/sys-utils/unshare.1
index dd12c74461e64c3d8dd5e81f0de06ef4d8fb9a42..79ab96a1be9a4eeb28bdc5f22b8348ac29f04112 100644 (file)
--- a/sys-utils/unshare.1
+++ b/sys-utils/unshare.1
@@ -14,7 +14,8 @@ run (default: /bin/sh).
 The namespaces can optionally be made persistent by bind mounting
 /proc/\fIpid\fR/ns/\fItype\fR files to a filesystem path and entered with
 .BR \%nsenter (1)
-even after the \fIprogram\fR terminates.
+even after the \fIprogram\fR terminates (except PID namespaces where
+permanently running init process is required).
 Once a persistent \%namespace is no longer needed, it can be unpersisted with
 .BR umount (8).
 See the \fBEXAMPLES\fR section for more details.