kcptun install and systemd daemon

kcptun.sh

wget https://github.com/xtaci/kcptun/releases/download/v20180316/kcptun-linux-amd64-20180316.tar.gz
tar xvf kcptun-linux-amd64-20180316.tar.gz
sudo mv server_linux_amd64 /usr/local/bin/kcptun_server
sudo mv client_linux_amd64 /usr/local/bin/kcptun_client
sudo mkdir -p /etc/kcptun

sudo bash -c "cat <<EOT > /etc/kcptun/server_conf.json
{
    \"listen\": \":4321\",
    \"target\": \"127.0.0.1:8421\",
    \"mode\": \"fast3\",
    \"dscp\": 46,
    \"crypt\": \"salsa20\",
    \"key\": \"THE PASSWORD\"
}
EOT"

sudo bash -c "cat <<EOT > /etc/systemd/system/kcptun_server.service
[Unit]
Description=Kcptun server
Requires=network.target
After=network-online.target
    
[Service]
Type=simple
User=nobody
RemainAfterExit=yes
ExecStart=/usr/local/bin/kcptun_server -c /etc/kcptun/server_conf.json
ExecReload=/usr/bin/kill -HUP $MAINPID
RestartSec=1min
Restart=on-failure
    
[Install]
WantedBy=multi-user.target
EOT"

sudo systemctl enable kcptun_server
sudo systemctl start kcptun_server


sudo bash -c "cat <<EOT > /etc/kcptun/client_conf.json
{
    \"localaddr\": \":38421\",
    \"remoteaddr\": \"<server_ip>:4321\",
    \"mode\": \"fast2\",
    \"dscp\": 46,
    \"crypt\": \"salsa20\",
    \"key\": \"THE PASSWORD\"
}
EOT"

sudo bash -c "cat <<EOT > /etc/systemd/system/kcptun_client.service
[Unit]
Description=Kcptun client
Requires=network.target
After=network-online.target
    
[Service]
Type=simple
User=nobody
RemainAfterExit=yes
ExecStart=/usr/local/bin/kcptun_client -c /etc/kcptun/client_conf.json
ExecReload=/usr/bin/kill -HUP $MAINPID
RestartSec=1min
Restart=on-failure
    
[Install]
WantedBy=multi-user.target
EOT"

sudo systemctl enable kcptun_client
sudo systemctl start kcptun_client