add missing bit to background doc

[newns] / newns

diff --git a/newns b/newns
index b45c994987c208e9aa570552e2b8c85987c8c3fe..4bd1650f7179bddeb1ba0e09888d37d27bf49b31 100755 (executable)
--- a/newns
+++ b/newns
@@ -40,7 +40,10 @@ usage() {
 usage: ${0##*/} [OPTS] start|stop NS_NAME
 Setup new or systemd created network namespace with nat and mount namespace
 
--c, --create    Create network namespace. For running outside systemd private net.
+-c, --create    Create a named network namespace. When running from
+                the same network namespace as pid 1, this is set automatically.
+                This is the case when running outside a systemd created
+                private network.
 -h, --help      Show this help and exit.
 
 From within a systemd network namespace, nat it to the outside. This
@@ -76,8 +79,8 @@ Background:
 This script does not make the namespace be named like ip does, because
 the naming is not necessary, although it could have been done with some
 more work. For debugging and joining the namespace with a bash shell, I
-use nsenter -n -m -t $(pgrep PROCESS_IN_NAMESPACE).  Note: if I knew how
-to easily ask systemd what pid a unit has, i would do that.
+use nsenter -n -m -t $(pgrep PROCESS_IN_NAMESPACE) bash.  Note: if I
+knew how to easily ask systemd what pid a unit has, i would do that.
 
 "ip netns new ..." also does a mount namespace, then bind
 mounts each file/dir in /etc/netns/NS_NAME to /etc/NS_NAME. Note,