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+.TH IP\-NETNS 8 "20 Dec 2011" "iproute2" "Linux"
+.SH NAME
+ip-netns \- process network namespace management
+.SH SYNOPSIS
+.sp
+.ad l
+.in +8
+.ti -8
+.B ip
+.RI "[ " OPTIONS " ]"
+.B netns
+.RI " { " COMMAND " | "
+.BR help " }"
+.sp
+.ti -8
+.BR "ip netns" " { " list " } "
+
+.ti -8
+.BR "ip netns" " { " add " | " delete " } "
+.I NETNSNAME
+
+.ti -8
+.BR "ip netns exec "
+.I NETNSNAME command ...
+
+.SH 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
+.BR "/var/run/netns/" NAME
+that can be opened. The file descriptor resulting from opening
+.BR "/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
+.B 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
+.BR "/etc/netns/" NAME "/"
+then in
+.BR "/etc/".
+For example, if you want a different version of
+.BR /etc/resolv.conf
+for a network namespace used to isolate your vpn you would name it
+.BR /etc/netns/myvpn/resolv.conf.
+
+.B 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.
+
+.SS ip netns list - show all of the named network namespaces
+.SS ip netns add NAME - create a new named network namespace
+.SS ip netns delete NAME - delete the name of a network namespace
+.SS ip netns exec NAME cmd ... - Run cmd in the named network namespace
+
+.SH EXAMPLES
+
+.SH SEE ALSO
+.br
+.BR ip (8)
+
+.SH AUTHOR
+Original Manpage by Eric W. Biederman