Cheatsheet for ip netns
/sbin/ip netns del ns-downloads /sbin/ip netns add ns-downloads /sbin/ip link add v-down-root type veth peer name v-down-peer /sbin/ip link set v-down-peer netns ns-downloads /sbin/brctl addif br-lan v-down-root /sbin/ip link set v-down-root up /sbin/ip netns exec ns-downloads /sbin/ip addr add 10.0.0.34/16 dev v-down-peer /sbin/ip netns exec ns-downloads /sbin/ip link set v-down-peer up /sbin/ip netns exec ns-downloads /sbin/ip link set lo up /sbin/ip netns exec ns-downloads /sbin/ip route add default via 10.0.0.1
root@misaka:~# /sbin/ip netns exec ns-downloads ifconfig
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1 (Local Loopback)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
v-down-peer: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.0.0.34 netmask 255.255.0.0 broadcast 0.0.0.0
inet6 fe80::6cb8:4aff:fe27:b3b0 prefixlen 64 scopeid 0x20<link>
ether 6e:b8:4a:27:b3:b0 txqueuelen 1000 (Ethernet)
RX packets 1168 bytes 363742 (355.2 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 363 bytes 148875 (145.3 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
/sbin/ip netns del ns-downloads