===== pgadmin 4 =====
<code>
apt-get install pgadmin4 pgadmin4-apache2 apache2 libapache2-mod-wsgi-py3
</code>

vim /etc/postgresql/9.6/main/pg_hba.conf
<code>
# Database administrative login by Unix domain socket
local   all             postgres                                peer

# TYPE  DATABASE        USER            ADDRESS                 METHOD

# "local" is for Unix domain socket connections only
local   all             all                                     peer
# IPv4 local connections:
host    all             all             127.0.0.1/32            md5
host    all             all             192.168.122.9/24            md5
# IPv6 local connections:
host    all             all             ::1/128                 md5
</code>

vim /etc/postgresql/9.6/main/postgresql.conf
<code>
# - Connection Settings -

listen_addresses = '192.168.122.9,localhost'            # what IP address(es) to listen on;
                                        # comma-separated list of addresses;
                                        # defaults to 'localhost'; use '*' for all
                                        # (change requires restart)
port = 5432                             # (change requires restart)
max_connections = 100                   # (change requires restart)
</code>
<code>
sudo -u postgres createuser -D -A -P myuser
su - postgres
psql
grant all privileges on database sempai to myuser;
grant all privileges on all tables in schema public to myuser;
</code>