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IP-NETNS(8)                          Linux                         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) sys-
       tem 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 net-
       work 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 applica-
       tions, 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)