sudo service postgresql initdb

sudo service postgresql initdb
Hint: the preferred way to do this is now "postgresql-setup initdb"
Initializing database ... OK

/var/lib/pgsql/data/pg_hba.conf

• PostgreSQL: psql, .psqlrc, .pgpass, $HOME/.pg service.conf, -U, -W, -d, meta-commands: \du, \dg, \ddp, \dp, \list, \dn, \dt, \c, \l, \di, \q, show users, show, su - postgres, psql -c, \?, \connect, \conninfo, --version, --help, PL/pgSQL
• Amazon Linux: Amazon Linux 2, Amazon Linux 2023, AMI, amazon-linux-extras, al2022