export PGSQL_DB_NAME=db_mydbname
export PGSQL_USERNAME=myusername
export PGSQL_USERPWD=mypassword
 
 
apt install postgresql
cp -a /etc/postgresql/13/main/pg_hba.conf /etc/postgresql/13/main/pg_hba.conf_
sed -i "s/local   all             all                                     peer/local   all             all                                     md5/g" /etc/postgresql/11/main/pg_hba.conf
service postgresql stop
service postgresql start
 
 
cd /
/bin/su postgres --command "/usr/bin/createuser --no-superuser --no-createdb --no-createrole --login ${PGSQL_USERNAME}"
/bin/su postgres --command "/usr/bin/psql --command=\"ALTER USER ${PGSQL_USERNAME} PASSWORD '${PGSQL_USERPWD}'\""
/bin/su postgres --command "/usr/bin/createdb --encoding UTF8 --owner ${PGSQL_USERNAME} ${PGSQL_DB_NAME}"
/bin/su postgres --command "/usr/bin/psql --command \"GRANT ALL PRIVILEGES ON DATABASE ${PGSQL_DB_NAME} to ${PGSQL_USERNAME}\""

/bin/su postgres --command "psql --command=\"\d\" --username=${PGSQL_USERNAME} --dbname=${PGSQL_DB_NAME}"

• drop database : /bin/su postgres –command “/usr/bin/dropdb ${PGSQL_DB_NAME}”
• drop user : /bin/su postgres –command “/usr/bin/dropuser ${PGSQL_USERNAME}”
• list databases : /bin/su postgres –command “/usr/bin/psql –command \”\list\“”
• list tables : /bin/su postgres –command “/usr/bin/psql –command \”\connect ${PGSQL_DB_NAME};\d;\“”
• list users : /bin/su postgres –command “/usr/bin/psql –command \”\du\“”
• list privileges : /bin/su postgres –command “/usr/bin/psql –command \”\l\“”

su - postgres
psql -U postgres
\l
DROP DATABASE xys;
\q

• http://www.ixany.org/docs/PostgreSQL_commandes_mysql.html
• https://tomcam.github.io/postgres/