lxc-usernsexec: invalid option -- '-' usage: lxc-usernsexec [-h] [-m <uid-maps>] -- [command [arg ..]] -h this message -m <uid-maps> uid maps to use uid-maps: [u|g|b]:ns_id:host_id:range [u|g|b]: map user id, group id, or both ns_id: the base id in the new namespace host_id: the base id in the parent namespace range: how many ids to map Note: This program uses newuidmap(2) and newgidmap(2). As such, /etc/subuid and /etc/subgid must grant the calling user permission to use the mapped ranges

lxc-usernsexec: invalid option -- '-' usage: lxc-usernsexec [-h] [-m <uid-maps>] -- [command [arg ..]] -h this message -m <uid-maps> uid maps to use uid-maps: [u|g|b]:ns_id:host_id:range [u|g|b]: map user id, group id, or both ns_id: the base id in the new namespace host_id: the base id in the parent namespace range: how many ids to map Note: This program uses newuidmap(2) and newgidmap(2). As such, /etc/subuid and /etc/subgid must grant the calling user permission to use the mapped ranges