LXC-USER-NIC(1)                                              LXC-USER-NIC(1)

NAME         top

       lxc-user-nic - Create and attach a nic to another network namespace.

SYNOPSIS         top

       lxc-user-nic pid type bridge [ nicname ]

DESCRIPTION         top

       lxc-user-nic is a setuid-root program with which unprivileged users
       may create network interfaces for use by a lxc container.

       It will consult the configuration file /usr/local/etc/lxc/lxc-usernet
       to determine the number of interfaces which the calling user is
       allowed to create, and which bridge he may attach them to. It tracks
       the number of interfaces each user has created using the file
       /run/lxc/nics. It ensures that the calling user is privileged over
       the network namespace to which the interface will be attached.

OPTIONS         top

       pid    The process id for the task to whose network namespace the
              interface should be attached.

       type   The network interface type to attach. Currently only veth is
              supported. With this type, two interfaces representing each
              tunnel endpoint are created. One endpoint will be attached to
              the specified bridge, while the other will be passed into the

       bridge The bridge to which to attach the network interface, for
              instance lxcbr0.

              The desired interface name in the container. This will be eth0
              if unspecified.

SEE ALSO         top

       lxc(1), lxc-start(1), lxc-usernet(5)

AUTHOR         top

       Daniel Lezcano <>

COLOPHON         top

       This page is part of the lxc (Linux containers) project.  Information
       about the project can be found at ⟨⟩.  If
       you have a bug report for this manual page, send it to  This page was obtained from the
       project's upstream Git repository ⟨git://⟩ on
       2017-03-13.  If you discover any rendering problems in this HTML ver‐
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                                 2017-03-13                  LXC-USER-NIC(1)