tModLoader Ubuntu 20.04 deploy script

#!/bin/bash
## tModLoader deploy script
## Ports: tcp 7777
## Expects: nothing
set -x

TMODLOADERVER=0.11.8.5
TERRARIA_VERSION=1353

cat > ~/.tmux.conf << 'EOF'
set -g history-limit 50000
set -g default-terminal "screen-256color"
set-option -g default-shell "/bin/bash"
set -g base-index 1
setw -g pane-base-index 1
EOF

dd if=/dev/zero of=/swapfile bs=1024 count=1048576
chmod 600 /swapfile
mkswap /swapfile
swapon /swapfile
swapon --show

cd
mkdir btop
cd btop
wget https://github.com/aristocratos/btop/releases/download/v1.1.4/btop-x86_64-linux-musl.tbz
tar -xf btop-x86_64-linux-musl.tbz
./install.sh
./setuid.sh

apt update
apt install -y unzip gnupg ca-certificates
apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
mkdir -p /etc/apt/sources.list.d/
touch /etc/apt/sources.list.d/mono-official-stable.list
echo "deb https://download.mono-project.com/repo/ubuntu stable-focal main" | tee /etc/apt/sources.list.d/mono-official-stable.list
apt update
apt install -y mono-devel

cd
mkdir terra
cd terra
wget "https://web.archive.org/web/20190630145553if_/http://terraria.org/server/terraria-server-${TERRARIA_VERSION}.zip"
unzip "terraria-server-${TERRARIA_VERSION}.zip"
rm "terraria-server-${TERRARIA_VERSION}.zip"
cp --verbose -a "${TERRARIA_VERSION}/Linux/." .
rm -r "${TERRARIA_VERSION}"
wget "https://github.com/tModLoader/tModLoader/releases/download/v$TMODLOADERVER/tModLoader.Linux.v$TMODLOADERVER.tar.gz"
tar -xf "tModLoader.Linux.v$TMODLOADERVER.tar.gz"
rm "tModLoader.Linux.v$TMODLOADERVER.tar.gz"
chmod u+x tModLoaderServer*