In my fresh Ubuntu 18.04 --
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04 LTS
Release: 18.04
Codename: bionic
Installed PostgreSQL 10 --
$ apt list --installed | grep -i postgres
postgresql-client-10/bionic,now 10.3-1 amd64 [installed]
postgresql-client-common/bionic,bionic,now 190 all [installed,automatic]
postgresql-common/bionic,bionic,now 190 all [installed,automatic]
postgresql-server-dev-10/bionic,now 10.3-1 amd64 [installed]
postgresql-server-dev-all/bionic,bionic,now 190 all [installed]
Both service and systemctl return immediately with no message but didn't start any postgres process --
$ sudo service postgresql restart
$ sudo systemctl restart postgresql
I'm completely at dark as there's neither conf nor log --
$ ll /etc/postgresql
total 8
drwxr-xr-x 2 root root 4096 Feb 8 12:26 ./
drwxr-xr-x 95 root root 4096 May 6 04:11 ../
$ ll /var/log/postgresql/
total 8
drwxrwxr-t 2 root postgres 4096 Feb 8 12:26 ./
drwxrwxr-x 10 root syslog 4096 May 6 04:10 ../
What is going on there? Any pointer will be much appreciated.
Edit: to make things worse, PostgreSQL 10 is the only listed package in Ubuntu 18.04, there's no obvious "apt" way to install older version of PostgreSQL