wget<\/code> to install it.<\/p>\n\n\n\nwget https:\/\/launcher.mojang.com\/v1\/objects\/1b557e7b033b583cd9f66746b7a9ab1ec1673ced\/server.jar -P ~\/server <\/pre>\n\n\n\nNow, we need to run the Minecraft server. It will fail on the first run because we need to accept the EULA. We also need to modify the server.properties file since the first run creates these files:<\/p>\n\n\n\n
cd ~\/server\njava -Xmx1024M -Xms1024M -jar server.jar nogui<\/code><\/pre>\n\n\n\nAfter the program fails to start, we need to modify the eula.txt file and change the eula=false<\/code> at the end of the file to eula=true<\/code>. Save this file and exit.
Next, we need to enable RCON in Minecraft. Open the server.properties file and search for the following variables, and change them accordingly:<\/p>\n\n\n\nrcon.port=25575<\/code>\nrcon.password=PassW0rd<\/code>\nenable-rcon=true<\/code><\/pre>\n\n\n\nAlso, while you are in this file, you can make any other changes that you want to the server, such as the server name, listening port for the server, the MOTD, etc. Also, choose a complex password so that not just anyone can remote control your server.<\/p>\n\n\n\n
Now, I like to have this run as a service using SystemD. To do this, create a service script. First you have to exit as the Minecraft user by typing exit<\/code> and getting back to your local admin shell. Then run the following:<\/p>\n\n\n\nsudo vi \/etc\/systemd\/system\/minecraft.service<\/code><\/p>\n\n\n\nPaste the following in the file:<\/p>\n\n\n\n
[Unit]\nDescription=Minecraft Server\nAfter=network.target\n\n[Service]\nUser=minecraft\nNice=1\nKillMode=none\nSuccessExitStatus=0 1\nProtectHome=true\nProtectSystem=full\nPrivateDevices=true\nNoNewPrivileges=true\nWorkingDirectory=\/opt\/minecraft\/server\nExecStart=\/usr\/bin\/java -Xmx2G -Xms2G -jar server.jar nogui\nExecStop=\/opt\/minecraft\/tools\/mcrcon\/mcrcon -H 127.0.0.1 -P 25575 -p PassW0rd stop\n\n[Install]\nWantedBy=multi-user.target<\/pre>\n\n\n\nSave the document. Next, run <\/p>\n\n\n\n
sudo systemctl daemon-reload<\/code><\/p>\n\n\n\nThis will refresh systemd with the new minecraft.service. <\/p>\n\n\n\n
Now, you can start the minecraft service:<\/p>\n\n\n\n
sudo systemctl start minecraft<\/code><\/p>\n\n\n\nTo get it to start on reboots, execute the following:<\/p>\n\n\n\n
sudo sytemctl enable minecraft<\/code><\/p>\n\n\n\nThe last thing we have to do is create the backup job for your server. This uses the MCRcon tool and crontab to clean up the server as well.<\/p>\n\n\n\n
Switch back to the Minecraft user and perform the following:<\/p>\n\n\n\n
sudo su - minecraft\nvi ~\/tools\/backup.sh<\/pre>\n\n\n\nPaste the following script into the new file you are creating:<\/p>\n\n\n\n
!\/bin\/bash\n function rcon {\n \/opt\/minecraft\/tools\/mcrcon\/mcrcon -H 127.0.0.1 -P 25575 -p PassW0rd \"$1\"\n }\n rcon \"save-off\"\n rcon \"save-all\"\n tar -cvpzf \/opt\/minecraft\/backups\/server-$(date +%F-%H-%M).tar.gz \/opt\/minecraft\/server\n rcon \"save-on\"\n # Delete older backups\n find \/opt\/minecraft\/backups\/ -type f -mtime +7 -name '*.gz' -delete<\/pre>\n\n\n\nNow, create a crontab to run the backup:<\/p>\n\n\n\n
crontab -e\n0 0 * * * \/opt\/minecraft\/tools\/backup.sh<\/pre>\n\n\n\nNow exit as the Minecraft user and return as the local admin. Lastly, because I leverage UFW for my firewall, I need to open the port to the world so that people can connect to it. I do that with the following commands:<\/p>\n\n\n\n
sudo ufw allow from 10.1.10.0\/24 to any 25575\nsudo ufw allow 25565\/tcp\n<\/pre>\n\n\n\nThis allows the Remote console to be accessed only by my internal network, and allows the Minecraft game to be accessed by the outside world. <\/p>\n\n\n\n
Now, you are ready to connect your Minecraft clients to your server and have some fun! <\/p>\n\n\n\n
Let me know if this guide worked for you or if you have any questions or comments, please leave them below. <\/p>\n","protected":false},"excerpt":{"rendered":"
Hello everyone. I hope you are all doing well. I am writing this blog entry because I created a Minecraft server for my kids some time ago, but I had a hardware failure in the system and never replaced it. At the time, it was no big deal since the boys decided that they were […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[30,37,98,6],"tags":[90,103,34,101,100,102,99,67,69,5],"class_list":["post-226","post","type-post","status-publish","format-standard","hentry","category-games","category-howto","category-java","category-ubuntu","tag-20-04","tag-crontab","tag-games","tag-git","tag-java","tag-mccron","tag-minecraft","tag-server","tag-systemd","tag-ubuntu"],"_links":{"self":[{"href":"https:\/\/www.lucaswilliams.net\/index.php\/wp-json\/wp\/v2\/posts\/226","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lucaswilliams.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lucaswilliams.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lucaswilliams.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lucaswilliams.net\/index.php\/wp-json\/wp\/v2\/comments?post=226"}],"version-history":[{"count":1,"href":"https:\/\/www.lucaswilliams.net\/index.php\/wp-json\/wp\/v2\/posts\/226\/revisions"}],"predecessor-version":[{"id":227,"href":"https:\/\/www.lucaswilliams.net\/index.php\/wp-json\/wp\/v2\/posts\/226\/revisions\/227"}],"wp:attachment":[{"href":"https:\/\/www.lucaswilliams.net\/index.php\/wp-json\/wp\/v2\/media?parent=226"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lucaswilliams.net\/index.php\/wp-json\/wp\/v2\/categories?post=226"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lucaswilliams.net\/index.php\/wp-json\/wp\/v2\/tags?post=226"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}