$ sudo openvpn --secret static.key  --remote $SERVER --dev tun1 --ifconfig $CLIENT $SERVER
Wed Mar  7 12:50:16 2018 disabling NCP mode (--ncp-disable) because not in P2MP client or server mode
Wed Mar  7 12:50:16 2018 WARNING: file 'static.key' is group or others accessible
Wed Mar  7 12:50:16 2018 OpenVPN 2.4.0 arm-unknown-linux-gnueabihf [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [PKCS11] [MH/PKTINFO] [AEAD] built on Jul 18 2017
Wed Mar  7 12:50:16 2018 library versions: OpenSSL 1.0.2l  25 May 2017, LZO 2.08
Wed Mar  7 12:50:16 2018 WARNING: INSECURE cipher with block size less than 128 bit (64 bit).  This allows attacks like SWEET32.  Mitigate by using a --cipher with a larger block size (e.g. AES-256-CBC).
Wed Mar  7 12:50:16 2018 WARNING: INSECURE cipher with block size less than 128 bit (64 bit).  This allows attacks like SWEET32.  Mitigate by using a --cipher with a larger block size (e.g. AES-256-CBC).
Wed Mar  7 12:50:16 2018 TUN/TAP device tun1 opened
Wed Mar  7 12:50:16 2018 do_ifconfig, tt->did_ifconfig_ipv6_setup=0
Wed Mar  7 12:50:16 2018 /sbin/ip link set dev tun1 up mtu 1500
Wed Mar  7 12:50:16 2018 /sbin/ip addr add dev tun1 local $CLIENT peer $SERVER
Wed Mar  7 12:50:16 2018 TCP/UDP: Preserving recently used remote address: [AF_INET]$SERVER:1194
Wed Mar  7 12:50:16 2018 UDP link local (bound): [AF_INET][undef]:1194
Wed Mar  7 12:50:16 2018 UDP link remote: [AF_INET]$SERVER:1194
Wed Mar  7 12:50:17 2018 Peer Connection Initiated with [AF_INET]$SERVER:1194
Wed Mar  7 12:50:18 2018 Initialization Sequence Completed
Wed Mar  7 12:50:46 2018 event_wait : Interrupted system call (code=4)
Wed Mar  7 12:50:46 2018 /sbin/ip addr del dev tun1 local $CLIENT peer $SERVER
Wed Mar  7 12:50:46 2018 SIGINT[hard,] received, process exiting