ip-netns - process network namespace management
ip netns exec NETNSNAME command ...
A network namespace is logically another copy of the network stack, with it's
own routes, firewall rules, and network devices.
By convention a named network namespace is an object at
NAME that can be opened. The file descriptor resulting
from opening /var/run/netns/
NAME refers to the specified network
namespace. Holding that file descriptor open keeps the network namespace
alive. The file descriptor can be used with the setns(2)
system call to
change the network namespace associated with a task.
The convention for network namespace aware applications is to look for global
network configuration files first in /etc/netns/
. For example, if you want a different version of
for a network namespace used to isolate your vpn you
would name it /etc/netns/myvpn/resolv.conf.
ip netns exec
automates handling of this configuration, file convention
for network namespace unaware applications, by creating a mount namespace and
bind mounting all of the per network namespace configure files into their
traditional location in /etc.
ip netns list - show all of the named network namespaces¶
ip netns add NAME - create a new named network namespace¶
ip netns delete NAME - delete the name of a network
ip netns exec NAME cmd ... - Run cmd in the named network
Original Manpage by Eric W. Biederman