Valheim Dedicated Server Setup on Ubuntu 20.04.1 LTS

readme.md

Port forwarding

Open ports (udp)

2456 2457 2458 27060

Uncomplicated Firewall

sudo ufw allow 2456/udp
sudo ufw allow 2457/udp
sudo ufw allow 2458/udp
sudo ufw allow 27060/udp

Setup SteamCMD

Add multiverse repo

sudo add-apt-repository multiverse

Add i386 architecture

sudo dpkg --add-architecture i386

Update and install SteamCMD

sudo apt update && sudo apt install lib32gcc1 steamcmd 

Install server files

Make a new folder in your home directory example /home/tattoine/valheim

mkdir valheim && cd valheim

Install Valheim server files (change directory/username)

/home/tattoine/.steam/steamcmd/steamcmd.sh +login anonymous +force_install_dir /home/tattoine/valheim +app_update 896660 validate +exit

Create your own start script (use your preferred editor)

nano start_valheim.sh

Paste below to start_valheim.sh (change directory/username)

#!/bin/bash

export templdpath=$LD_LIBRARY_PATH
export LD_LIBRARY_PATH=./linux64:$LD_LIBRARY_PATH
export SteamAppId=892970

# Tip: Make a local copy of this script to avoid it being overwritten by steam.
# NOTE: Minimum password length is 5 characters & Password cant be in the server name.
# NOTE: You need to make sure the ports 2456-2458 is being forwarded to your server through your local router & firewall.
/home/tattoine/.steam/steamcmd/steamcmd.sh +login anonymous +force_install_dir /home/tattoine/valheim +app_update 896660 +quit

./valheim_server.x86_64 -name "Banana Fury" -port 2456 -nographics -batchmode -world "Dedicated" -password "hello123" -public 1 > /dev/null &
export LD_LIBRARY_PATH=$templdpath

echo "Server started"

Setting execute permissions

chmod +x start_valheim.sh

Create a service script (use your preferred editor)

nano valheim.service

Paste below to start_valheim.sh (change directory/username)

[Unit]
Description=Valheim service
Wants=network-online.target
After=syslog.target network.target nss-lookup.target network-online.target

[Service]
Type=simple
Restart=on-failure
RestartSec=10
StartLimitInterval=60s
StartLimitBurst=3
User=steam
Group=steam
ExecStartPre=/home/tattoine/.steam/steamcmd/steamcmd.sh +login anonymous +force_install_dir /home/tattoine/valheim +app_update 896660 validate +exit
ExecStart=/home/tattoine/valheim/start_valheim.sh
ExecReload=/bin/kill -s HUP $MAINPID
KillSignal=SIGINT
WorkingDirectory=/home/tattoine/valheim
LimitNOFILE=100000

[Install]
WantedBy=multi-user.target

Copy the service script to systemd and reload the deamon

sudo cp valheim.service /etc/systemd/system && sudo systemctl daemon-reload

Service Start/Stop/Status

sudo systemctl start valheim

Extras

Add service on system boot

sudo systemctl enable valheim.service

Get Steam64ID (one user per row)

nano ~/.config/unity3d/IronGate/Valheim/adminlist.txt

Server Commands

Only whitelisted admins can use commands, Open console with F5

Command	Args	Description
help		Lists all the commands you can use
kick	name/ip/userID	Kick the user
ban	name/ip/userID	Ban the user
unban	/ip/userID	Unban the user
banned		List banned users
ping		Send a ping to the server to get your latency
lodbias	1	Set distance lod bias. If empty shows actual lodbias. By default 1.5
info		System info

Hello, thanks very much, but my systemd reload every time, do you know why?

@Geordinateur Need more information to be able to help

if i launch server with script start_valheim.sh it's ok, but if i launch with systemd, the server is restart every 5 min.
I removed "&" in start_valheim.sh now its worked very well

my Valheim server is working but not through systemd.

Im very new to Ubuntu so go easy please.

[Unit]
Description=Valheim service
Wants=network.target
After=syslog.target network-online.target

[Service]
Type=simple
Restart=on-failure
RestartSec=10
User=adam
WorkingDirectory= /home/adam/Valheim
ExecStart= /home/adam/valheim/start_valheim.sh
LimitNOFILE-100000

[Install]
WantedBy=multi-user.target

This is what i have in my valheim.service file.

May 21 17:12:51 homeserver systemd[1]: Started Valheim service.
May 21 17:12:51 homeserver systemd[49211]: valheim.service: Failed to locate executable /home/adam/Valheim/start_valheim.sh: No such file or directory
May 21 17:12:51 homeserver systemd[49211]: valheim.service: Failed at step EXEC spawning /home/adam/Valheim/start_valheim.sh: No such file or directory
May 21 17:12:51 homeserver systemd[1]: valheim.service: Main process exited, code=exited, status=203/EXEC
May 21 17:12:51 homeserver systemd[1]: valheim.service: Failed with result 'exit-code'.
May 21 17:13:02 homeserver systemd[1]: valheim.service: Scheduled restart job, restart counter is at 6.
May 21 17:13:02 homeserver systemd[1]: Stopped Valheim service.
May 21 17:13:02 homeserver systemd[1]: Started Valheim service.
May 21 17:13:02 homeserver systemd[49406]: valheim.service: Failed to locate executable /home/adam/Valheim/start_valheim.sh: No such file or directory
May 21 17:13:02 homeserver systemd[49406]: valheim.service: Failed at step EXEC spawning /home/adam/Valheim/start_valheim.sh: No such file or directory
May 21 17:13:02 homeserver systemd[1]: valheim.service: Main process exited, code=exited, status=203/EXEC
May 21 17:13:02 homeserver systemd[1]: valheim.service: Failed with result 'exit-code'.
May 21 17:13:12 homeserver systemd[1]: valheim.service: Scheduled restart job, restart counter is at 7.
May 21 17:13:12 homeserver systemd[1]: Stopped Valheim service.
this is what journal logs are showing

@Choomyo This file is missing /home/adam/Valheim/start_valheim.sh or in the wrong path

sudo add-apt-repository multiverse for anyone having issues with adding the repo. He added and "a" at the end by accident.

Also you are missing 'sudo apt install software-properties-common' which is needed to get lib32gcc-s1 since it is not longer in available with just multiverse.