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The man page for ip command had grown too large to be readable. Break it up into separate pages.
69 lines
1.8 KiB
Groff
69 lines
1.8 KiB
Groff
.TH IP\-NETNS 8 "20 Dec 2011" "iproute2" "Linux"
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.SH NAME
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ip netns \- process network namespace management
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.SH SYNOPSIS
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.sp
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.ad l
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.in +8
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.ti -8
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.B ip
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.RI "[ " OPTIONS " ]"
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.B netns
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.RI " { " COMMAND " | "
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.BR help " }"
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.sp
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.ti -8
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.BR "ip netns" " { " list " } "
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.ti -8
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.BR "ip netns" " { " add " | " delete " } "
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.I NETNSNAME
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.ti -8
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.BR "ip netns exec "
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.I NETNSNAME command ...
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.SH DESCRIPTION
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A network namespace is logically another copy of the network stack,
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with it's own routes, firewall rules, and network devices.
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By convention a named network namespace is an object at
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.BR "/var/run/netns/" NAME
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that can be opened. The file descriptor resulting from opening
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.BR "/var/run/netns/" NAME
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refers to the specified network namespace. Holding that file
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descriptor open keeps the network namespace alive. The file
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descriptor can be used with the
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.B setns(2)
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system call to change the network namespace associated with a task.
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The convention for network namespace aware applications is to look
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for global network configuration files first in
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.BR "/etc/netns/" NAME "/"
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then in
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.BR "/etc/".
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For example, if you want a different version of
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.BR /etc/resolv.conf
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for a network namespace used to isolate your vpn you would name it
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.BR /etc/netns/myvpn/resolv.conf.
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.B ip netns exec
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automates handling of this configuration, file convention for network
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namespace unaware applications, by creating a mount namespace and
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bind mounting all of the per network namespace configure files into
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their traditional location in /etc.
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.SS ip netns list - show all of the named network namespaces
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.SS ip netns add NAME - create a new named network namespace
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.SS ip netns delete NAME - delete the name of a network namespace
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.SS ip netns exec NAME cmd ... - Run cmd in the named network namespace
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.SH EXAMPLES
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.SH SEE ALSO
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.br
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.BR ip (8)
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.SH AUTHOR
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Original Manpage by Eric W. Biederman
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