Install

DigitalOcean 1Gb 1vCPU Droplet Debian 9.7 64-bit

Update Packages

aptitude update; aptitude upgrade

Install Packages

aptitude -y install apt-transport-https build-essential dirmngr htop python-dev python-pip tcl tcpdump unzip

Update /root/.bashrc

export REDIS_SOCKET=/tmp/redis.sock
export REDIS_PASSWORD=d74fe559c0

Update /etc/sysctl.conf

net.core.somaxconn=60000
fs.file-max=1000000

Update /etc/security/limits.conf

* soft nofile 1000000
* hard nofile 1000000

Install tor

vi /etc/apt/sources.list.d/tor.list
    deb https://deb.torproject.org/torproject.org stretch main
    deb-src https://deb.torproject.org/torproject.org stretch main

gpg --recv A3C4F0F979CAA22CDBA8F512EE8CBC9E886DDD89
gpg --export A3C4F0F979CAA22CDBA8F512EE8CBC9E886DDD89 | apt-key add -
aptitude update
aptitude install tor deb.torproject.org-keyring

vi /etc/tor/torrc
    Log notice file /var/log/tor/notices.log

service tor reload

Install Redis

cd; wget http://download.redis.io/releases/redis-5.0.5.tar.gz
tar xzf redis-5.0.5.tar.gz; cd redis-5.0.5; make; make test
make install
cd utils; bash install_server.sh

vi /etc/init.d/redis_6379
***************************************************************************
#!/bin/sh
EXEC=/usr/local/bin/redis-server
CLIEXEC=/usr/local/bin/redis-cli
PIDFILE=/var/run/redis_6379.pid
CONF="/etc/redis/6379.conf"
REDISSOCKET="/tmp/redis.sock"
REDISPASSWORD="d74fe559c0"

###############
# SysV Init Information
# chkconfig: - 58 74
# description: redis_6379 is the redis daemon.
### BEGIN INIT INFO
# Provides: redis_6379
# Required-Start: $network $local_fs $remote_fs
# Required-Stop: $network $local_fs $remote_fs
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Should-Start: $syslog $named
# Should-Stop: $syslog $named
# Short-Description: start and stop redis_6379
# Description: Redis daemon
### END INIT INFO

case "$1" in
    start)
        if [ -f $PIDFILE ]
        then
            echo "$PIDFILE exists, process is already running or crashed"
        else
            echo "Starting Redis server..."
            $EXEC $CONF
        fi
        ;;
    stop)
        if [ ! -f $PIDFILE ]
        then
            echo "$PIDFILE does not exist, process is not running"
        else
            PID=$(cat $PIDFILE)
            echo "Stopping ..."
            $CLIEXEC -s $REDISSOCKET -a $REDISPASSWORD shutdown
            while [ -x /proc/${PID} ]
            do
                echo "Waiting for Redis to shutdown ..."
                sleep 1
            done
            echo "Redis stopped"
        fi
        ;;
    status)
        PID=$(cat $PIDFILE)
        if [ ! -x /proc/${PID} ]
        then
            echo 'Redis is not running'
        else
            echo "Redis is running ($PID)"
        fi
        ;;
    restart)
        $0 stop
        $0 start
        ;;
    *)
        echo "Please use start, stop, restart or status as first argument"
        ;;
esac
***************************************************************************

update-rc.d redis_6379 defaults

vi /etc/redis/6379.conf
    unixsocket /tmp/redis.sock
    unixsocketperm 777
    #save 900 1
    #save 300 10
    #save 60 10000
    requirepass d74fe559c0
    maxclients 50000
    maxmemory 2048mb
    maxmemory-policy volatile-lru
    notify-keyspace-events K$z
    activerehashing no

Reboot Server

reboot

Launch Crawler

git clone https://github.com/Groestlcoin/groestlnodes
cd groestlnodes
pip install -r requirements.txt
bash geoip/update.sh
bash start.sh