cd /usr/src/linux-source-5.16
cp /boot/config-5.16.0-4-amd64 .config
Editar arquivo .config
# CONFIG_TUN is not set
CONFIG_TUN=m
cp ../linux-headers-5.16.0-4-amd64/Module.symvers .
make scripts prepare modules_prepare
make -C . M=drivers/net/
insmod drivers/net/tun.ko
cp drivers/net/tun.ko /lib/modules/5.16.0-4-amd64/kernel/drivers/net/
depmod