OpenStack or Bust, Part 9: ubuntu ip-netns(8) manpage

IP-NETNS(8)

NAME
       ip-netns - process network namespace management

SYNOPSIS
       ip [ OPTIONS ] netns  { COMMAND | help }

       ip netns { list }

       ip netns { add | delete } NETNSNAME

       ip netns exec NETNSNAME command ...

DESCRIPTION
       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 /var/run/netns/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/NAME/ then in /etc/.  For example, if you want a
       different version of /etc/resolv.conf 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 namespace
   ip netns exec NAME cmd ... - Run cmd in the named network namespace
EXAMPLES
SEE ALSO
       ip(8)

AUTHOR
       Original Manpage by Eric W. Biederman

iproute2                                                                             20 Dec 2011                                                                          IP-NETNS(8)