How to compile Yenten coin 4.0.0 on ubuntu 20.04 LTS

From source, without gui:

1 ) Installation depends

sudo add-apt-repository universe
sudo apt-get update
sudo apt-get install git
sudo apt-get install build-essential
sudo apt-get install libtool autotools-dev autoconf
sudo apt-get install libssl-dev
sudo apt-get install libboost-all-dev
sudo apt-get install pkg-config
sudo apt-get install libevent-dev
sudo apt-get install libzmq3-dev

2 ) Download source, install db4, configure and compilation

• /home/ubuntu/yenten/contrib/db4 - may have a different folder path*

git clone https://github.com/yentencoin/yenten.git
cd yenten
cd contrib
chmod +x install_db4.sh
./install_db4.sh .
cd ..
export BDB_PREFIX='/home/ubuntu/yenten/contrib/db4'
./configure --enable-upnp-default --without-gui BDB_LIBS="-L${BDB_PREFIX}/lib -ldb_cxx-4.8" BDB_CFLAGS="-I${BDB_PREFIX}/include"
make -j 4

run daemon

cd src
./yentend

conf file (yenten.conf)

cd ~/.yenten/
nano yenten.conf

server=1
daemon=1
gen=0
rpcuser=user
rpcpassword=your_password
rpcallowip=your_network/your_mask
rpcallowip=127.0.0.1
addnode=185.185.70.244:9981
addnode=spbird.mydns.jp:9981

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https://xpoolx.com/explorer/peers?id=1897
https://leywapool.com/explorer/peers?id=1428
https://trossmining.de/explorer/peers?id=1943