Tun missing! Find them!

And so I had this problem when my TUN disappeared.

It all started when my OPENVPN suddenly did not want to work.

When i manually tried to openvpn the server.conf file. All i got was this.
Wed Feb 4 10:05:18 2015 OpenVPN 2.2.1 x86_64-linux-gnu [SSL] [LZO2] [EPOLL] [PKCS11] [eurephia] [MH] [PF_INET6] [IPv6 payload 20110424-2 (2.2RC2)] built on Dec 1 2014
Wed Feb 4 10:05:18 2015 NOTE: OpenVPN 2.1 requires '--script-security 2' or higher to call user-defined scripts or executables
Wed Feb 4 10:05:18 2015 Diffie-Hellman initialized with 1024 bit key
Wed Feb 4 10:05:18 2015 TLS-Auth MTU parms [ L:1542 D:138 EF:38 EB:0 ET:0 EL:0 ]
Wed Feb 4 10:05:18 2015 Socket Buffers: R=[133120->131072] S=[133120->131072]
Wed Feb 4 10:05:18 2015 ROUTE: default_gateway=UNDEF
Wed Feb 4 10:05:18 2015 Note: Cannot open TUN/TAP dev /dev/net/tun: No such file or directory (errno=2)
Wed Feb 4 10:05:18 2015 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0
Wed Feb 4 10:05:18 2015 /sbin/ifconfig 10.8.0.1 pointopoint 10.8.0.2 mtu 1500
SIOCSIFADDR: No such device
: ERROR while getting interface flags: No such device
SIOCSIFDSTADDR: No such device
: ERROR while getting interface flags: No such device
SIOCSIFMTU: No such device
Wed Feb 4 10:05:18 2015 Linux ifconfig failed: external program exited with error status: 1
Wed Feb 4 10:05:18 2015 Exiting

As you can see, there was an error opening the TUN interface with error number 2.
I then checked with my VPS provider and apparently the fault was on their end. 
They then make TUN appear.

To show that TUN was there:
root@xxx:/# cat /dev/net/tun 
cat: /dev/net/tun: File descriptor in bad state
root@xxx:/# 

However, running the openvpn server.conf now produces a different kind of error.
root@xxx:/etc/openvpn# openvpn server.conf
Thu Feb 5 15:33:14 2015 OpenVPN 2.2.1 x86_64-linux-gnu [SSL] [LZO2] [EPOLL] [PKCS11] [eurephia] [MH] [PF_INET6] [IPv6 payload 20110424-2 (2.2RC2)] built on Dec 1 2014
Thu Feb 5 15:33:14 2015 NOTE: OpenVPN 2.1 requires '--script-security 2' or higher to call user-defined scripts or executables
Thu Feb 5 15:33:14 2015 Diffie-Hellman initialized with 1024 bit key
Thu Feb 5 15:33:14 2015 TLS-Auth MTU parms [ L:1542 D:138 EF:38 EB:0 ET:0 EL:0 ]
Thu Feb 5 15:33:14 2015 Socket Buffers: R=[133120->131072] S=[133120->131072]
Thu Feb 5 15:33:14 2015 ROUTE: default_gateway=UNDEF
Thu Feb 5 15:33:14 2015 Note: Cannot open TUN/TAP dev /dev/net/tun: Operation not permitted (errno=1)
Thu Feb 5 15:33:14 2015 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0
Thu Feb 5 15:33:14 2015 /sbin/ifconfig 10.8.0.1 pointopoint 10.8.0.2 mtu 1500
SIOCSIFADDR: No such device
: ERROR while getting interface flags: No such device
SIOCSIFDSTADDR: No such device
: ERROR while getting interface flags: No such device
SIOCSIFMTU: No such device
Thu Feb 5 15:33:14 2015 Linux ifconfig failed: external program exited with error status: 1
Thu Feb 5 15:33:14 2015 Exiting
root@xxx:/etc/openvpn#

It now shows that errno is 1.
I then ding dong with the VPS but they could not help me out as my SLA did not cover 3rd party.
Thus, i am left with the harsh choice of reinstalling my VPS.
However, after reinstalling, the problem exist.
Out of the blue, i just issue the ultimate command.
rm /dev/net/tun && reboot

SUDDENLY, all was fine....
So if next time you have such an error, just remove the god dam tun....