pptp:
Couldn't open the /dev/ppp device: No such device or address
Please load the ppp_generic kernel module.
l2tp:
L2TP kernel support not detected (try modprobing l2tp_ppp and pppol2tp)
openvpn:
ERROR: Cannot open TUN/TAP dev /dev/net/tun: No such file or directory (errno=2)
Softether:
Error getting hardware address for "vpn_se": No such device
nfs-server:
System has not been booted with systemd as init system (PID 1). Can't operate.
cifs-server:
Failed to open nmb socket on interface 10.10.30.15 for port 137. Error was Address already in use
smbXsrv_version_global_init: failed to open[/run/samba/smbXsrv_version_global.tdb] - NT_STATUS_ACCESS_DENIED