Provided by: liblxc-common_5.0.0~git2209-g5a7b9ce67-0ubuntu3_amd64 bug


       lxc-user-nic - Manage nics in another network namespace


       lxc-user-nic create {lxcpath} {name} {pid} {type} {bridge} {container nicname}
       lxc-user-nic delete {lxcpath} {name} {path to network namespace} {type} {bridge}
                    {container nicname}


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

       It  will  consult  the  configuration file /etc/lxc/lxc-usernet to determine the number of
       interfaces which the calling user is allowed to create, and which bridge they  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.  lxc-user-nic also allows one to delete network
       devices.  Currently only ovs ports can be deleted.


              The path of the container. This is currently not used.

       name   The name of the container. This is currently not used.

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

       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.

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

       path to network namespace
              A path to open to get a file descriptor for the target network namespace.  This  is
              only relevant when an veth device is deleted.


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


       Christian Brauner <>

       Serge Hallyn <>

       Daniel Lezcano <>

                                            2022-09-07                            lxc-user-nic(1)