`tunctl` is provided by `uml_utilities` package for "User Mode Linux", which is a long-dead-since-year-2007 project. Some distros (e.g. Arch Linux) have dropped support for `uml_utilities` years ago (Arch Linux dropped it in May 2013: https://lists.archlinux.org/pipermail/aur-general/2013-May/023611.html). One should now use `ip tuntap` provided by `iproute2` package on modern distros.
Signed-off-by: Sergey Matveev <stargrave@stargrave.org>
@verbatim
server% ip addr add 192.168.0.1/24 dev wlan0
-server% tunctl -t tap10
+server% ip tuntap add dev tap10 mode tap
server% ip addr add 172.16.0.1/24 dev tap10
server% ip link set up dev tap10
@end verbatim
@verbatim
client% ip addr add 192.168.0.2/24 dev wlan0
-client% tunctl -t tap10
+client% ip tuntap add dev tap10 mode tap
client% ip addr add 172.16.0.2/24 dev tap10
client% ip link set up dev tap10
client% ip route add default via 172.16.0.1