A small step-by-step guide, how to install Deeponion headless wallet for ubuntu/debian:

sudo apt update
sudo apt -y upgrade
sudo apt-get install git qt5-default qt5-qmake qtbase5-dev-tools qttools5-dev-tools build-essential libboost-dev libboost-system-dev libboost-filesystem-dev libboost-program-options-dev libboost-thread-dev libssl-dev libdb++-dev libevent-dev libminiupnpc-dev

git clone https://github.com/deeponion/deeponion.git
cd deeponion
sudo chmod +x src/leveldb/build_detect_platform
cd src/leveldb
make libleveldb.a libmemenv.a
cd ..
make -f makefile.unix

./DeepOniond -daemon // Note down the rpc password, it is needed later

cd ~'YourUser'/.DeepOnion
nano DeepOnion.conf

Paste the following in the config file:
listen=1
server=1
maxconnections=500
rpcuser=DeepOnionrpc
rpcpassword= 'Your RPCpassword'
port=17570
rpcport=18580
rpcconnect=127.0.0.1
addnode=slz2b7zvopuigglc.onion:17570
addnode=rv5wufytede2ki4q.onion:17570
addnode=mjtsga47m4ehvzc6.onion:17570
addnode=msjtgahbiplfdf7z.onion:17570
addnode=udds4ybjgb7bm5hv.onion:17570
addnode=jynkusuegv3c5kt5.onion:17570
addnode=v45vkus7rfmzkx5n.onion:17570
addnode=dy4x34flsdmnkees.onion:17570
addnode=whtz3syntx57owrg.onion:17570
addnode=ykirxcowpwfas5ny.onion:17570
addnode=4e4pjxcj4hvt6qnh.onion:17570

Recent nodes can be looked up here: https://deeponion.org/DeepOnion.conf.php

Now you're ready to go, to stake your onions :) !
Go back to deeponion/src and start the daemon