diff --git a/man7/network_namespaces.7 b/man7/network_namespaces.7
index b7a00b106..c136c42b1 100644
--- a/man7/network_namespaces.7
+++ b/man7/network_namespaces.7
@@ -27,16 +27,17 @@
 .SH NAME
 network_namespaces \- overview of Linux network namespaces
 .SH DESCRIPTION
-.\" FIXME: /sys/class/net -- see sysfs(5)
-.\" FIXME : /proc/net
-.\" FIXME : /var/run/netns
 Network namespaces provide isolation of the system resources associated
 with networking: network devices, IPv4 and IPv6 protocol stacks,
-IP routing tables, firewalls, the
+IP routing tables, firewall rules, the
 .I /proc/net
-directory, the
+directory (which is a symbolic link to
+.IR /proc/PID/net ),
+the
 .I /sys/class/net
-directory, port numbers (sockets), and so on.
+directory, various files under
+.IR /proc/sys/net ,
+port numbers (sockets), and so on.
 .PP
 A physical network device can live in exactly one
 network namespace.